How do I determine which revenue from the App Store belongs to which app?
There are (free) services that do that for you. You can also generate nice looking reports for the people who helped you with the games:


AppFigures (we've been using them for 4+ years): http://appfigures.com
AppAnnie (not so much a fan personally): http://appannie.com
LaunchKit (goes directly to Slack, but not real "overview"): http://launchkit.io/sales