AWS Lambda Revenue Tracker

I have a couple of AWS Lambda function that are Java 8 Zip package that need to be optimized to run faster. A for loop that loops and prints the data returned from an API call needs to be changed to just return the count. I've attached the class files that need to modified but to complete the project I'll provide the Java 8 Zip package and the developer will ned to unzip it, un-compile the class file, modify the java code, re-compile it, zip it into a Java 8 Zip package to be uploaded to my Lambda function.