diff --git a/src/scripts/main.js b/src/scripts/main.js
index c6e3f8784..ad9790085 100644
--- a/src/scripts/main.js
+++ b/src/scripts/main.js
@@ -1,3 +1,21 @@
 'use strict';
 
-// write your code here
+const populations = document.querySelectorAll('.population');
+
+const validNumbers = Array.from(populations)
+  .map((span) => span.textContent.replace(/,/g, '').trim())
+  .map((value) => Number(value))
+  .filter((num) => Number.isFinite(num));
+
+const total = validNumbers.reduce((sum, num) => sum + num, 0);
+const average = validNumbers.length ? total / validNumbers.length : 0;
+const totalElement = document.querySelector('.total-population');
+const averageElement = document.querySelector('.average-population');
+
+if (totalElement) {
+  totalElement.textContent = total.toLocaleString('en-US');
+}
+
+if (averageElement) {
+  averageElement.textContent = Math.round(average).toLocaleString('en-US');
+}