rename outstanding to result in calculateOutstanding

Author: kaiosilveira

index.js

@@ -26,13 +26,13 @@ function printBanner() {
 }
 
 function calculateOutstanding(invoice) {
-  let outstanding = 0;
+  let result = 0;
 
   for (const o of invoice.orders) {
-    outstanding += o.amount;
+    result += o.amount;
   }
 
-  return outstanding;
+  return result;
 }
 
 module.exports = { printOwing };