diff --git a/index.js b/index.js
index ff28a6f9..581399f0 100644
--- a/index.js
+++ b/index.js
@@ -1,22 +1,10 @@
-class NumberArray {
-  constructor(numbers) {
-    this.numbers = numbers;
-  }
-
-  getPositiveSum() {
-    let sum = 0;
-    for (let number of this.numbers) {
-      if (number > 0) {
-        sum += number;
-      }
-    }
-    return sum;
-  }
-}
-
 const numbers = [2, -4, 6, -8, 10, -12];
-const numberArray = new NumberArray(numbers);
-const positiveSum = numberArray.getPositiveSum();
 
-// Input: [2, -4, 6, -8, 10, -12]
-// Output: 18
+const getPositiveSum = (numbers) => {
+  const positiveNumbers = numbers.filter(number => number > 0);
+  const sum = positiveNumbers.reduce((acc, curr) => acc + curr, 0);
+  return sum;
+};
+
+const positiveSum = getPositiveSum(numbers);
+console.log(positiveSum); // Output: 18
\ No newline at end of file