This spreadsheet lets small board game publishers estimate their income, expenses, and profit for a full catalog of games:

spreadsheet: https://docs.google.com/spreadsheets/d/1AEwMSR2W-_s-C9v4xsd8DQ4_73J-O1Gt7hxsW4IHeY0/edit#gid=0

how-to video: https://www.youtube.com/watch?v=BqJeU7AUz3Y