diff --git a/index.js b/index.js
index f73934895..441a22e2c 100644
--- a/index.js
+++ b/index.js
@@ -1,3 +1,4 @@
 const batteryBatches = [4, 5, 3, 4, 4, 6, 5];
 
 // Code your solution here
+const totalBatteries = batteryBatches.reduce((totalCount, battery) => totalCount + battery, 0)