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 all invoiced amounts came from.