diff --git a/src/scripts/main.js b/src/scripts/main.js
index c6e3f8784..a9afc4b23 100644
--- a/src/scripts/main.js
+++ b/src/scripts/main.js
@@ -1,3 +1,34 @@
 'use strict';
 
-// write your code here
+const values = document.getElementsByClassName('population');
+const totalPopulation = document.querySelector('.total-population');
+const averagePopulation = document.querySelector('.average-population');
+
+function CalculateTotalPopulation() {
+  // eslint-disable-next-line no-shadow
+  let total = 0;
+  let sourceCount = 0;
+
+  for (const population of values) {
+    const textValue = population.textContent.replaceAll(',', '');
+    const value = Number(textValue);
+
+    if (!isNaN(value)) {
+      total += value;
+      sourceCount += 1;
+    }
+  }
+
+  return { total, sourceCount };
+}
+
+function calculateAveragePopulation(totalValue, sourceCount) {
+  return Math.round(totalValue / sourceCount);
+}
+
+const total = CalculateTotalPopulation();
+const average = calculateAveragePopulation(total.total, total.sourceCount);
+
+totalPopulation.textContent = total.total.toLocaleString('en-US');
+
+averagePopulation.textContent = average.toLocaleString('en-US');