To track where you revenue is coming from in more detail, you can enable Accounting Codes for your space. To do that, go to Setup » Invoice Settings and check the corresponding box.
After that, Cobot will show you a text field for entering an Accounting Code in all the places where you enter a price, e.g. Plans, Time Passes, Booking Resources or Charges. Cobot will add these Accounting Codes to all invoices (and to the CSV exports), enabling you to see where the entirety of the invoiced amounts came from.