diff --git a/spending.db b/spending.db
new file mode 100644
index 0000000..f67a8ce
Binary files /dev/null and b/spending.db differ
diff --git a/src/main/java/edu/ucsd/spendingtracker/App.java b/src/main/java/edu/ucsd/spendingtracker/App.java
index 7d2f29b..8f7e281 100644
--- a/src/main/java/edu/ucsd/spendingtracker/App.java
+++ b/src/main/java/edu/ucsd/spendingtracker/App.java
@@ -1,6 +1,7 @@
 package edu.ucsd.spendingtracker;
 
 import edu.ucsd.spendingtracker.datasource.InMemoryDataSource;
+import edu.ucsd.spendingtracker.datasource.SqlDataSource;
 import edu.ucsd.spendingtracker.model.Model;
 import edu.ucsd.spendingtracker.presenter.PresenterManager;
 import edu.ucsd.spendingtracker.presenter.SpendingPresenter;
@@ -14,7 +15,9 @@
 public class App extends Application {
     @Override
     public void start(Stage primaryStage) {
-        InMemoryDataSource dataSource = InMemoryDataSource.getDefaultDataSource();
+        // InMemoryDataSource dataSource = InMemoryDataSource.getDefaultDataSource();
+        SqlDataSource dataSource = new SqlDataSource();
+
         ExpenseRepository repository = new ExpenseRepository(dataSource);
 
         Model sharedModel = new Model(repository);
diff --git a/src/main/java/edu/ucsd/spendingtracker/datasource/IDataSource.java b/src/main/java/edu/ucsd/spendingtracker/datasource/IDataSource.java
new file mode 100644
index 0000000..271cbc8
--- /dev/null
+++ b/src/main/java/edu/ucsd/spendingtracker/datasource/IDataSource.java
@@ -0,0 +1,13 @@
+package edu.ucsd.spendingtracker.datasource;
+
+import java.util.List;
+
+import edu.ucsd.spendingtracker.model.Expense;
+
+public interface IDataSource {
+    List<Expense> getExpenses();
+
+    void addExpense(Expense expense);
+
+    void deleteExpense(int id);
+}
diff --git a/src/main/java/edu/ucsd/spendingtracker/datasource/InMemoryDataSource.java b/src/main/java/edu/ucsd/spendingtracker/datasource/InMemoryDataSource.java
index c71abcd..908f914 100644
--- a/src/main/java/edu/ucsd/spendingtracker/datasource/InMemoryDataSource.java
+++ b/src/main/java/edu/ucsd/spendingtracker/datasource/InMemoryDataSource.java
@@ -6,29 +6,31 @@
 import edu.ucsd.spendingtracker.model.Category;
 import edu.ucsd.spendingtracker.model.Expense;
 
-public class InMemoryDataSource {
+public class InMemoryDataSource implements IDataSource{
     private List<Expense> expenses = new ArrayList<>();
 
-    public InMemoryDataSource() {
-    }
-
+    @Override
     public List<Expense> getExpenses() {
         return List.copyOf(expenses);
     }
-
+    @Override
     public void addExpense(Expense expense) {
         expenses.add(expense);
     }
 
-    public final static List<Expense> DEFAULT_EXPENSES = List.of(
-            new Expense("Groceries", Category.FOOD, 150.75),
-            new Expense("Utilities", Category.UTILITIES, 80.50),
-            new Expense("Gas", Category.TRANSPORT, 60.00));
-
-    public static InMemoryDataSource getDefaultDataSource() {
-        InMemoryDataSource dataSource = new InMemoryDataSource();
-        dataSource.expenses.addAll(DEFAULT_EXPENSES);
-        return dataSource;
+    public void deleteExpense(int expenseID) {
+        expenses.removeIf(expense -> expense.getId() == expenseID);
     }
+
+    // public final static List<Expense> DEFAULT_EXPENSES = List.of(
+            // new Expense("Groceries", Category.FOOD, 150.75),
+            // new Expense("Utilities", Category.UTILITIES, 80.50),
+            // new Expense("Gas", Category.TRANSPORT, 60.00));
+
+    // public static InMemoryDataSource getDefaultDataSource() {
+        // InMemoryDataSource dataSource = new InMemoryDataSource();
+        // dataSource.expenses.addAll(DEFAULT_EXPENSES);
+        // return dataSource;
+    // }
 }
 
diff --git a/src/main/java/edu/ucsd/spendingtracker/datasource/SqlDataSource.java b/src/main/java/edu/ucsd/spendingtracker/datasource/SqlDataSource.java
new file mode 100644
index 0000000..46ff235
--- /dev/null
+++ b/src/main/java/edu/ucsd/spendingtracker/datasource/SqlDataSource.java
@@ -0,0 +1,65 @@
+package edu.ucsd.spendingtracker.datasource;
+
+
+import edu.ucsd.spendingtracker.model.*;
+import java.sql.*;
+import java.util.ArrayList;
+import java.util.List;
+
+
+public class SqlDataSource implements IDataSource {
+   private final String url = "jdbc:sqlite:spending.db";
+
+
+   public SqlDataSource() {
+       try (Connection conn = DriverManager.getConnection(url)) {
+           conn.createStatement().execute(
+                   "CREATE TABLE IF NOT EXISTS expenses (id INTEGER PRIMARY KEY AUTOINCREMENT, name TEXT, category TEXT, amount REAL)");
+       } catch (SQLException e) {
+           e.printStackTrace();
+       }
+   }
+
+
+   @Override
+   public List<Expense> getExpenses() {
+       List<Expense> list = new ArrayList<>();
+       try (Connection conn = DriverManager.getConnection(url);
+               ResultSet rs = conn.createStatement().executeQuery("SELECT * FROM expenses")) {
+           while (rs.next()) {
+               list.add(new Expense(rs.getInt("id"), rs.getString("name"),
+                       Category.valueOf(rs.getString("category")), rs.getDouble("amount")));
+           }
+       } catch (SQLException e) {
+           e.printStackTrace();
+       }
+       return list;
+   }
+
+
+   @Override
+   public void addExpense(Expense e) {
+       try (Connection conn = DriverManager.getConnection(url);
+               PreparedStatement ps = conn
+                       .prepareStatement("INSERT INTO expenses(name, category, amount) VALUES(?,?,?)")) {
+           ps.setString(1, e.getName());
+           ps.setString(2, e.getCategory().name());
+           ps.setDouble(3, e.getAmount());
+           ps.executeUpdate();
+       } catch (SQLException err) {
+           err.printStackTrace();
+       }
+   }
+
+
+   @Override
+   public void deleteExpense(int id) {
+       try (Connection conn = DriverManager.getConnection(url);
+               PreparedStatement ps = conn.prepareStatement("DELETE FROM expenses WHERE id = ?")) {
+           ps.setInt(1, id);
+           ps.executeUpdate();
+       } catch (SQLException e) {
+           e.printStackTrace();
+       }
+   }
+}
diff --git a/src/main/java/edu/ucsd/spendingtracker/model/Expense.java b/src/main/java/edu/ucsd/spendingtracker/model/Expense.java
index 3b73dca..a8dea45 100644
--- a/src/main/java/edu/ucsd/spendingtracker/model/Expense.java
+++ b/src/main/java/edu/ucsd/spendingtracker/model/Expense.java
@@ -4,11 +4,20 @@ public class Expense {
     private String name;
     private Category category;
     private double amount;
+    private int id;
 
     public Expense(String name, Category category, double amount) {
         this.name = name;
         this.category = category;
         this.amount = amount;
+        this.id = -1;
+    }
+
+    public Expense(int id, String name, Category category, double amount) {
+        this.name = name;
+        this.category = category;
+        this.amount = amount;
+        this.id = id;
     }
 
     public String getName() {
@@ -22,6 +31,10 @@ public Category getCategory() {
     public double getAmount() {
         return amount;
     }
+
+    public int getId() {
+        return id;
+    }
 }
 
 
diff --git a/src/main/java/edu/ucsd/spendingtracker/model/Model.java b/src/main/java/edu/ucsd/spendingtracker/model/Model.java
index 97e5c80..41ddd0b 100644
--- a/src/main/java/edu/ucsd/spendingtracker/model/Model.java
+++ b/src/main/java/edu/ucsd/spendingtracker/model/Model.java
@@ -14,6 +14,10 @@ public void addExpense(Expense e) {
         repository.addExpense(e);
     }
 
+    public void deleteExpense(int id) {
+        repository.deleteExpense(id);
+    }
+
     public List<Expense> getExpenses() {
         return repository.getExpenses();
     }
diff --git a/src/main/java/edu/ucsd/spendingtracker/presenter/SpendingPresenter.java b/src/main/java/edu/ucsd/spendingtracker/presenter/SpendingPresenter.java
index 171568d..e19b965 100644
--- a/src/main/java/edu/ucsd/spendingtracker/presenter/SpendingPresenter.java
+++ b/src/main/java/edu/ucsd/spendingtracker/presenter/SpendingPresenter.java
@@ -14,6 +14,18 @@ public SpendingPresenter(Model model, SpendingView view) {
                 onShowSummary.run();
         });
 
+        this.view.setOnDelete(id->{
+            model.deleteExpense(id);
+            updateView();
+        });
+
+        this.view.getOpenModalButton().setOnAction(e -> {
+            view.showAddExpenseModal(newExpense -> {
+                model.addExpense(newExpense);
+                updateView();
+            });
+        });
+
         updateView();
     }
 
@@ -25,12 +37,17 @@ public void setOnShowSummary(Runnable action) {
     public String getViewTitle() {
         return "Expenses";
     }
-
+    @Override
     public void updateView() {
-        int i = 1;
+        view.clearList();
+
         for (Expense e : model.getExpenses()) {
-            view.addExpenseRow(i++, e.getName(), e.getCategory().name(),
-                    e.getCategory().color, e.getAmount());
+            view.addExpenseRow(
+                e.getId(), 
+                e.getName(), 
+                e.getCategory().name(),
+                e.getCategory().color,
+                 e.getAmount());
         }
     }
 }
diff --git a/src/main/java/edu/ucsd/spendingtracker/repository/ExpenseRepository.java b/src/main/java/edu/ucsd/spendingtracker/repository/ExpenseRepository.java
index 91f5f8e..8694683 100644
--- a/src/main/java/edu/ucsd/spendingtracker/repository/ExpenseRepository.java
+++ b/src/main/java/edu/ucsd/spendingtracker/repository/ExpenseRepository.java
@@ -1,13 +1,14 @@
 package edu.ucsd.spendingtracker.repository;
 
 import java.util.List;
-import edu.ucsd.spendingtracker.datasource.InMemoryDataSource;
+
+import edu.ucsd.spendingtracker.datasource.IDataSource;
 import edu.ucsd.spendingtracker.model.Expense;
 
 public class ExpenseRepository {
-    private final InMemoryDataSource dataSource;
+    private IDataSource dataSource; 
 
-    public ExpenseRepository(InMemoryDataSource dataSource) {
+    public ExpenseRepository(IDataSource dataSource) {
         this.dataSource = dataSource;
     }
 
@@ -19,6 +20,11 @@ public List<Expense> getExpenses() {
         return dataSource.getExpenses();
     }
 
+    public void deleteExpense(int expenseID)
+    {
+        dataSource.deleteExpense(expenseID);
+    }
+
     public double getTotal() {
         double total = 0;
         for (Expense expense : dataSource.getExpenses()) {
diff --git a/src/main/java/edu/ucsd/spendingtracker/view/SpendingView.java b/src/main/java/edu/ucsd/spendingtracker/view/SpendingView.java
index b9dab5f..02ed959 100644
--- a/src/main/java/edu/ucsd/spendingtracker/view/SpendingView.java
+++ b/src/main/java/edu/ucsd/spendingtracker/view/SpendingView.java
@@ -1,36 +1,60 @@
 package edu.ucsd.spendingtracker.view;
 
 import javafx.geometry.*;
+import javafx.scene.Scene;
 import javafx.scene.control.*;
 import javafx.scene.layout.*;
 import javafx.scene.text.*;
+import javafx.stage.Modality;
+import javafx.stage.Stage;
+import java.util.function.Consumer;
+import edu.ucsd.spendingtracker.model.Expense;
+import edu.ucsd.spendingtracker.model.Category;
+
 
 public class SpendingView extends BorderPane {
     private VBox listContainer;
     private Button summaryButton;
+    private Button openAddModalBtn;
+    private Consumer<Integer> onDeleteHandler;
 
     public SpendingView() {
-        VBox headerBox = new VBox(10);
+        VBox headerBox = new VBox(15);
         headerBox.setAlignment(Pos.CENTER);
         headerBox.setPadding(new Insets(20));
 
+
         Text title = new Text("Spending Tracker");
-        title.setStyle("-fx-font-weight: bold; -fx-font-size: 24;");
+        title.setStyle("-fx-font-weight: bold; -fx-font-size: 26;");
+
+
+        HBox navBox = new HBox(10);
+        navBox.setAlignment(Pos.CENTER);
+
+
         summaryButton = new Button("View Summary");
-        headerBox.getChildren().addAll(title, summaryButton);
+        openAddModalBtn = new Button("Add New Expense +");
+        openAddModalBtn.setStyle("-fx-background-color: #2E7D32; -fx-text-fill: white; -fx-font-weight: bold;");
+
+
+        navBox.getChildren().addAll(openAddModalBtn, summaryButton);
+        headerBox.getChildren().addAll(title, navBox);
+
 
         listContainer = new VBox(5);
         ScrollPane scroller = new ScrollPane(listContainer);
         scroller.setFitToWidth(true);
         scroller.setStyle("-fx-background-color: transparent; -fx-background: #FFFFFF;");
 
+
         this.setTop(headerBox);
         this.setCenter(scroller);
         this.setPadding(new Insets(0, 25, 20, 25));
         this.setStyle("-fx-background-color: #FFFFFF;");
     }
 
-    public void addExpenseRow(int idx, String name, String catName, String color, double amount) {
+
+     public void addExpenseRow(int id, String name, String catName, String color, double amount) {
         HBox row = new HBox(10);
         row.setPrefSize(450, 40);
         row.setPadding(new Insets(5, 10, 5, 10));
@@ -39,6 +63,7 @@ public void addExpenseRow(int idx, String name, String catName, String color, do
                 "-fx-border-width: 0 0 1 0; -fx-font-weight: bold; " +
                 "-fx-border-radius: 5px; -fx-background-radius: 5px;");
 
+
         Label nameL = new Label(name);
         nameL.setPrefWidth(200);
         Label catL = new Label("[" + catName + "]");
@@ -47,12 +72,72 @@ public void addExpenseRow(int idx, String name, String catName, String color, do
         Label amtL = new Label("$" + String.format("%.2f", amount));
         amtL.setPrefWidth(80);
         amtL.setAlignment(Pos.CENTER_RIGHT);
+        Button deleteBtn = new Button("X");
+        deleteBtn.setStyle("-fx-background-color: #ff6961; -fx-text-fill: white;");
+        deleteBtn.setOnAction(e -> {
+            if (onDeleteHandler != null)
+                onDeleteHandler.accept(id);
+        });
+
 
-        row.getChildren().addAll(new Label(idx + "."), nameL, catL, amtL);
+        row.getChildren().addAll(nameL, catL, amtL, deleteBtn);
         listContainer.getChildren().add(row);
     }
 
+
+    public void showAddExpenseModal(Consumer<Expense> onSave) {
+        Stage modal = new Stage();
+        modal.initModality(Modality.APPLICATION_MODAL); // Blocks the main window
+        modal.setTitle("Add New Expense");
+
+
+        VBox layout = new VBox(15);
+        layout.setPadding(new Insets(20));
+        layout.setAlignment(Pos.CENTER);
+
+
+        TextField nameField = new TextField();
+        nameField.setPromptText("Expense Name");
+        TextField amountField = new TextField();
+        amountField.setPromptText("Amount");
+        ComboBox<Category> categoryBox = new ComboBox<>();
+        categoryBox.getItems().setAll(Category.values());
+
+
+        Button saveBtn = new Button("Save Expense");
+        saveBtn.setOnAction(e -> {
+            try {
+                double amount = Double.parseDouble(amountField.getText());
+                onSave.accept(new Expense(nameField.getText(), categoryBox.getValue(), amount));
+                modal.close();
+            } catch (NumberFormatException ex) {
+                amountField.setStyle("-fx-border-color: red;");
+            }
+        });
+
+
+        layout.getChildren().addAll(new Label("Expense Details"), nameField, amountField, categoryBox, saveBtn);
+        modal.setScene(new Scene(layout, 300, 250));
+        modal.showAndWait();
+    }
+
+
     public Button getSummaryButton() {
         return summaryButton;
     }
+
+    public void clearList() {
+        listContainer.getChildren().clear();
+    }
+
+
+    public void setOnDelete(Consumer<Integer> handler) {
+        this.onDeleteHandler = handler;
+    }
+
+
+    public Button getOpenModalButton() {
+        return openAddModalBtn;
+    }
+
 }
diff --git a/src/test/java/edu/ucsd/spendingtracker/repository/ExpenseRepositoryTest.java b/src/test/java/edu/ucsd/spendingtracker/repository/ExpenseRepositoryTest.java
index b9f7718..9c4ceb1 100644
--- a/src/test/java/edu/ucsd/spendingtracker/repository/ExpenseRepositoryTest.java
+++ b/src/test/java/edu/ucsd/spendingtracker/repository/ExpenseRepositoryTest.java
@@ -2,8 +2,8 @@
 
 import edu.ucsd.spendingtracker.model.Category;
 import edu.ucsd.spendingtracker.model.Expense;
-// import edu.ucsd.spendingtracker.datasource.IDataSource;
-// import edu.ucsd.spendingtracker.datasource.InMemoryDataSource;
+import edu.ucsd.spendingtracker.datasource.IDataSource;
+import edu.ucsd.spendingtracker.datasource.InMemoryDataSource;
 import org.junit.jupiter.api.BeforeEach;
 import org.junit.jupiter.api.Test;
 import org.junit.jupiter.api.DisplayName;
@@ -14,55 +14,50 @@
 
 public class ExpenseRepositoryTest {
 
-    @Test
-    void placeholderTest() {
-        assertTrue(true);
-    }
-
-    // private ExpenseRepository repo;
-    // private IDataSource dataSource;
-
-    // @BeforeEach
-    // void setUp() {
-    //     dataSource = new InMemoryDataSource();
-    //     repo = new ExpenseRepository(dataSource);
-    // }
+    private ExpenseRepository repo;
+    private IDataSource dataSource;
 
-    // @Test
-    // @DisplayName("Should start with an empty list")
-    // void testInitialEmpty() {
-    //     assertEquals(0, repo.getExpenses().size(), "Repository should be empty initially.");
-    // }
+    @BeforeEach
+    void setUp() {
+        dataSource = new InMemoryDataSource();
+        repo = new ExpenseRepository(dataSource);
+    }
 
-    // @Test
-    // @DisplayName("Adding an expense should increase the list size")
-    // void testAddExpense() {
-    //     Expense coffee = new Expense("Coffee", Category.FOOD, 5.50);
-    //     repo.addExpense(coffee);
+    @Test
+    @DisplayName("Should start with an empty list")
+    void testInitialEmpty() {
+        assertEquals(0, repo.getExpenses().size(), "Repository should be empty initially.");
+    }
 
-    //     List<Expense> expenses = repo.getExpenses();
-    //     assertEquals(1, expenses.size());
-    //     assertEquals("Coffee", expenses.get(0).getName());
-    //     assertEquals(5.50, expenses.get(0).getAmount());
-    // }
+    @Test
+    @DisplayName("Adding an expense should increase the list size")
+    void testAddExpense() {
+        Expense coffee = new Expense("Coffee", Category.FOOD, 5.50);
+        repo.addExpense(coffee);
+
+        List<Expense> expenses = repo.getExpenses();
+        assertEquals(1, expenses.size());
+        assertEquals("Coffee", expenses.get(0).getName());
+        assertEquals(5.50, expenses.get(0).getAmount());
+    }
 
-    // @Test
-    // @DisplayName("Deleting an expense should remove it from the list")
-    // void testDeleteExpense() {
-    //     repo.addExpense(new Expense("Rent", Category.OTHER, 1200.00));
-    //     Expense toDelete = repo.getExpenses().get(0);
-    //     int id = toDelete.getId();
-    //     repo.deleteExpense(id);
-    //     assertEquals(0, repo.getExpenses().size(), "List should be empty after deletion.");
-    // }
+    @Test
+    @DisplayName("Deleting an expense should remove it from the list")
+    void testDeleteExpense() {
+        repo.addExpense(new Expense("Rent", Category.OTHER, 1200.00));
+        Expense toDelete = repo.getExpenses().get(0);
+        int id = toDelete.getId();
+        repo.deleteExpense(id);
+        assertEquals(0, repo.getExpenses().size(), "List should be empty after deletion.");
+    }
 
-    // @Test
-    // @DisplayName("Should handle multiple expenses correctly")
-    // void testMultipleExpenses() {
-    //     repo.addExpense(new Expense("Gas", Category.TRANSPORT, 40.00));
-    //     repo.addExpense(new Expense("Movie", Category.ENTERTAINMENT, 15.00));
-    //     repo.addExpense(new Expense("Apples", Category.FOOD, 4.00));
+    @Test
+    @DisplayName("Should handle multiple expenses correctly")
+    void testMultipleExpenses() {
+        repo.addExpense(new Expense("Gas", Category.TRANSPORT, 40.00));
+        repo.addExpense(new Expense("Movie", Category.ENTERTAINMENT, 15.00));
+        repo.addExpense(new Expense("Apples", Category.FOOD, 4.00));
 
-    //     assertEquals(3, repo.getExpenses().size());
-    // }
+        assertEquals(3, repo.getExpenses().size());
+    }
 }
\ No newline at end of file
diff --git a/target/classes/edu/ucsd/spendingtracker/App.class b/target/classes/edu/ucsd/spendingtracker/App.class
index ad685f9..dd6d8f7 100644
Binary files a/target/classes/edu/ucsd/spendingtracker/App.class and b/target/classes/edu/ucsd/spendingtracker/App.class differ
diff --git a/target/classes/edu/ucsd/spendingtracker/datasource/IDataSource.class b/target/classes/edu/ucsd/spendingtracker/datasource/IDataSource.class
new file mode 100644
index 0000000..b287ede
Binary files /dev/null and b/target/classes/edu/ucsd/spendingtracker/datasource/IDataSource.class differ
diff --git a/target/classes/edu/ucsd/spendingtracker/datasource/InMemoryDataSource.class b/target/classes/edu/ucsd/spendingtracker/datasource/InMemoryDataSource.class
index 6c7de2f..6585adb 100644
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diff --git a/target/classes/edu/ucsd/spendingtracker/datasource/SqlDataSource.class b/target/classes/edu/ucsd/spendingtracker/datasource/SqlDataSource.class
new file mode 100644
index 0000000..11f3c5e
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diff --git a/target/classes/edu/ucsd/spendingtracker/model/Category.class b/target/classes/edu/ucsd/spendingtracker/model/Category.class
index 579567f..b0f2382 100644
Binary files a/target/classes/edu/ucsd/spendingtracker/model/Category.class and b/target/classes/edu/ucsd/spendingtracker/model/Category.class differ
diff --git a/target/classes/edu/ucsd/spendingtracker/model/Expense.class b/target/classes/edu/ucsd/spendingtracker/model/Expense.class
index eeb02a3..54a9a01 100644
Binary files a/target/classes/edu/ucsd/spendingtracker/model/Expense.class and b/target/classes/edu/ucsd/spendingtracker/model/Expense.class differ
diff --git a/target/classes/edu/ucsd/spendingtracker/model/Model.class b/target/classes/edu/ucsd/spendingtracker/model/Model.class
index dee4092..3a8060f 100644
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diff --git a/target/classes/edu/ucsd/spendingtracker/presenter/AbstractPresenter.class b/target/classes/edu/ucsd/spendingtracker/presenter/AbstractPresenter.class
index ae006cb..5011d7b 100644
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diff --git a/target/classes/edu/ucsd/spendingtracker/presenter/PresenterManager.class b/target/classes/edu/ucsd/spendingtracker/presenter/PresenterManager.class
index 95a828c..684408d 100644
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diff --git a/target/classes/edu/ucsd/spendingtracker/presenter/PresenterSwitcher.class b/target/classes/edu/ucsd/spendingtracker/presenter/PresenterSwitcher.class
index 25a5a41..b73c27a 100644
Binary files a/target/classes/edu/ucsd/spendingtracker/presenter/PresenterSwitcher.class and b/target/classes/edu/ucsd/spendingtracker/presenter/PresenterSwitcher.class differ
diff --git a/target/classes/edu/ucsd/spendingtracker/presenter/SpendingPresenter.class b/target/classes/edu/ucsd/spendingtracker/presenter/SpendingPresenter.class
index 1efeb89..238d4aa 100644
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diff --git a/target/classes/edu/ucsd/spendingtracker/presenter/SummaryPresenter.class b/target/classes/edu/ucsd/spendingtracker/presenter/SummaryPresenter.class
index d3d99c7..0e808ca 100644
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diff --git a/target/classes/edu/ucsd/spendingtracker/repository/ExpenseRepository.class b/target/classes/edu/ucsd/spendingtracker/repository/ExpenseRepository.class
index a94d74d..4187af3 100644
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diff --git a/target/classes/edu/ucsd/spendingtracker/view/SpendingView.class b/target/classes/edu/ucsd/spendingtracker/view/SpendingView.class
index 321c15c..d85bda3 100644
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diff --git a/target/classes/edu/ucsd/spendingtracker/view/SummaryView.class b/target/classes/edu/ucsd/spendingtracker/view/SummaryView.class
index b936786..c8a5ba9 100644
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diff --git a/target/classes/module-info.class b/target/classes/module-info.class
index 02f23fd..f7e553d 100644
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diff --git a/target/maven-status/maven-compiler-plugin/compile/default-compile/createdFiles.lst b/target/maven-status/maven-compiler-plugin/compile/default-compile/createdFiles.lst
index e69de29..a8ce4f0 100644
--- a/target/maven-status/maven-compiler-plugin/compile/default-compile/createdFiles.lst
+++ b/target/maven-status/maven-compiler-plugin/compile/default-compile/createdFiles.lst
@@ -0,0 +1,16 @@
+edu/ucsd/spendingtracker/view/SummaryView.class
+edu/ucsd/spendingtracker/presenter/SpendingPresenter.class
+edu/ucsd/spendingtracker/model/Model.class
+edu/ucsd/spendingtracker/presenter/SummaryPresenter.class
+edu/ucsd/spendingtracker/App.class
+module-info.class
+edu/ucsd/spendingtracker/repository/ExpenseRepository.class
+edu/ucsd/spendingtracker/datasource/IDataSource.class
+edu/ucsd/spendingtracker/datasource/InMemoryDataSource.class
+edu/ucsd/spendingtracker/model/Expense.class
+edu/ucsd/spendingtracker/datasource/SqlDataSource.class
+edu/ucsd/spendingtracker/model/Category.class
+edu/ucsd/spendingtracker/presenter/AbstractPresenter.class
+edu/ucsd/spendingtracker/presenter/PresenterSwitcher.class
+edu/ucsd/spendingtracker/presenter/PresenterManager.class
+edu/ucsd/spendingtracker/view/SpendingView.class
diff --git a/target/maven-status/maven-compiler-plugin/compile/default-compile/inputFiles.lst b/target/maven-status/maven-compiler-plugin/compile/default-compile/inputFiles.lst
index c5ac4cb..3b467f5 100644
--- a/target/maven-status/maven-compiler-plugin/compile/default-compile/inputFiles.lst
+++ b/target/maven-status/maven-compiler-plugin/compile/default-compile/inputFiles.lst
@@ -1,13 +1,16 @@
-c:\Users\tonyn\Desktop\Lab3_Starter1\src\main\java\edu\ucsd\spendingtracker\App.java
-c:\Users\tonyn\Desktop\Lab3_Starter1\src\main\java\edu\ucsd\spendingtracker\model\CategoryModel.java
-c:\Users\tonyn\Desktop\Lab3_Starter1\src\main\java\edu\ucsd\spendingtracker\model\ExpenseModel.java
-c:\Users\tonyn\Desktop\Lab3_Starter1\src\main\java\edu\ucsd\spendingtracker\view\SummaryView.java
-c:\Users\tonyn\Desktop\Lab3_Starter1\src\main\java\edu\ucsd\spendingtracker\presenter\PresenterManager.java
-c:\Users\tonyn\Desktop\Lab3_Starter1\src\main\java\module-info.java
-c:\Users\tonyn\Desktop\Lab3_Starter1\src\main\java\edu\ucsd\spendingtracker\repository\ExpenseRepository.java
-c:\Users\tonyn\Desktop\Lab3_Starter1\src\main\java\edu\ucsd\spendingtracker\presenter\AbstractPresenter.java
-c:\Users\tonyn\Desktop\Lab3_Starter1\src\main\java\edu\ucsd\spendingtracker\InMemoryDataSource\InMemoryDataSource.java
-c:\Users\tonyn\Desktop\Lab3_Starter1\src\main\java\edu\ucsd\spendingtracker\view\SpendingView.java
-c:\Users\tonyn\Desktop\Lab3_Starter1\src\main\java\edu\ucsd\spendingtracker\presenter\SpendingPresenter.java
-c:\Users\tonyn\Desktop\Lab3_Starter1\src\main\java\edu\ucsd\spendingtracker\presenter\SummaryPresenter.java
-c:\Users\tonyn\Desktop\Lab3_Starter1\src\main\java\edu\ucsd\spendingtracker\presenter\PresenterSwitcher.java
+/Users/rickyzam/Documents/UCSD/CSE110/CSE110-Lab4/src/main/java/edu/ucsd/spendingtracker/App.java
+/Users/rickyzam/Documents/UCSD/CSE110/CSE110-Lab4/src/main/java/edu/ucsd/spendingtracker/datasource/IDataSource.java
+/Users/rickyzam/Documents/UCSD/CSE110/CSE110-Lab4/src/main/java/edu/ucsd/spendingtracker/datasource/InMemoryDataSource.java
+/Users/rickyzam/Documents/UCSD/CSE110/CSE110-Lab4/src/main/java/edu/ucsd/spendingtracker/datasource/SqlDataSource.java
+/Users/rickyzam/Documents/UCSD/CSE110/CSE110-Lab4/src/main/java/edu/ucsd/spendingtracker/model/Category.java
+/Users/rickyzam/Documents/UCSD/CSE110/CSE110-Lab4/src/main/java/edu/ucsd/spendingtracker/model/Expense.java
+/Users/rickyzam/Documents/UCSD/CSE110/CSE110-Lab4/src/main/java/edu/ucsd/spendingtracker/model/Model.java
+/Users/rickyzam/Documents/UCSD/CSE110/CSE110-Lab4/src/main/java/edu/ucsd/spendingtracker/presenter/AbstractPresenter.java
+/Users/rickyzam/Documents/UCSD/CSE110/CSE110-Lab4/src/main/java/edu/ucsd/spendingtracker/presenter/PresenterManager.java
+/Users/rickyzam/Documents/UCSD/CSE110/CSE110-Lab4/src/main/java/edu/ucsd/spendingtracker/presenter/PresenterSwitcher.java
+/Users/rickyzam/Documents/UCSD/CSE110/CSE110-Lab4/src/main/java/edu/ucsd/spendingtracker/presenter/SpendingPresenter.java
+/Users/rickyzam/Documents/UCSD/CSE110/CSE110-Lab4/src/main/java/edu/ucsd/spendingtracker/presenter/SummaryPresenter.java
+/Users/rickyzam/Documents/UCSD/CSE110/CSE110-Lab4/src/main/java/edu/ucsd/spendingtracker/repository/ExpenseRepository.java
+/Users/rickyzam/Documents/UCSD/CSE110/CSE110-Lab4/src/main/java/edu/ucsd/spendingtracker/view/SpendingView.java
+/Users/rickyzam/Documents/UCSD/CSE110/CSE110-Lab4/src/main/java/edu/ucsd/spendingtracker/view/SummaryView.java
+/Users/rickyzam/Documents/UCSD/CSE110/CSE110-Lab4/src/main/java/module-info.java
diff --git a/target/test-classes/edu/ucsd/spendingtracker/repository/ExpenseRepositoryTest.class b/target/test-classes/edu/ucsd/spendingtracker/repository/ExpenseRepositoryTest.class
deleted file mode 100644
index 02f56bb..0000000
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