additional reporting for transactions and withdrawals?

[John Horton]

I had Adriano build a custom app for sports coaching. The app uses Commerce to collect $ from students and pays out coaches for lessons – minus my fee. 

The system that Adriano built works great. If the business grows I am worried about the accounting. As it is I do not see an easy way to correlate a lesson, the student payment, the money owed to the coach, and if the coach has withdrawn payment for a specific lesson.

Commerce works and I know the amounts credited to each coach are correct but my OCD wants a spreadsheet showing how the money moves around.

Are there any tools any solutions for additional reporting for transactions and withdrawals?