diff --git a/src/DataTypes.java b/src/DataTypes.java
index 4f807c1f..31cbc320 100644
--- a/src/DataTypes.java
+++ b/src/DataTypes.java
@@ -1,13 +1,12 @@
 import java.util.List;
 
 public class DataTypes {
-    // TODO TASK 1: fix this code so that it passes the test in DataTypesTest.java
     public static long sum(List<Integer> numbers) {
 
         int s = 0;
         // below is a "foreach" loop which iterates through numbers
         for (int x : numbers) {
-            s += x;
+            s += numbers.get(x);
         }
         return s;
     }