diff --git a/src/main/java/com/booleanuk/core/Basket.java b/src/main/java/com/booleanuk/core/Basket.java
new file mode 100644
index 0000000..674f4f4
--- /dev/null
+++ b/src/main/java/com/booleanuk/core/Basket.java
@@ -0,0 +1,24 @@
+package com.booleanuk.core;
+import java.util.HashMap;
+import java.util.Map;
+
+public class Basket {
+    public HashMap<String, Integer> basketList;
+    public int totalCost;
+
+    public Basket() {
+        this.basketList = new HashMap<>();
+        this.totalCost = 0;
+    }
+
+    public void addProduct(String product, int price) {
+        basketList.put(product, price);
+    }
+
+    public int calculateTotalCostInBasket() {
+        for (Map.Entry<String, Integer> entry : this.basketList.entrySet()) {
+            this.totalCost += entry.getValue();
+        }
+        return this.totalCost;
+    }
+}
diff --git a/src/test/java/com/booleanuk/core/BasketTest.java b/src/test/java/com/booleanuk/core/BasketTest.java
new file mode 100644
index 0000000..9fccec0
--- /dev/null
+++ b/src/test/java/com/booleanuk/core/BasketTest.java
@@ -0,0 +1,27 @@
+package com.booleanuk.core;
+
+import org.junit.jupiter.api.Assertions;
+import org.junit.jupiter.api.Test;
+
+public class BasketTest {
+
+    @Test
+    public void testThatAddProductAdsProductToBasketList() {
+        Basket basket = new Basket();
+
+        int beforeAddedItem = basket.basketList.size();
+        basket.addProduct("Product 1", 10);
+        int afterAddedItem = basket.basketList.size();
+
+        Assertions.assertTrue(beforeAddedItem < afterAddedItem);
+    }
+
+    @Test
+    public void testCalculatingTotalCostInBasket() {
+        Basket basket = new Basket();
+        basket.addProduct("Product 1", 10);
+
+        int totalCost = basket.calculateTotalCostInBasket();
+        Assertions.assertEquals(10, totalCost);
+    }
+}