diff --git a/src/scripts/main.js b/src/scripts/main.js
index c6e3f8784..0d68b92aa 100644
--- a/src/scripts/main.js
+++ b/src/scripts/main.js
@@ -1,3 +1,22 @@
 'use strict';
 
-// write your code here
+const populations = document.querySelectorAll('.population');
+
+const totalPopulations = [...populations]
+  .map((population) => population.textContent.replace(/\D/g, ''))
+  .map((population) => Number.parseInt(population, 10))
+  .filter((population) => !Number.isNaN(population));
+
+const total = totalPopulations.reduce((prev, next) => prev + next, 0);
+
+let average = 0;
+
+if (totalPopulations.length !== 0) {
+  average = total / totalPopulations.length;
+}
+
+document.querySelector('.total-population').textContent =
+  total.toLocaleString();
+
+document.querySelector('.average-population').textContent =
+  average.toLocaleString();