Someone made and shared a really nice spreadsheet for the F1, way back in the day, but I can’t seem to find it. AFAIK threads are only locked, not deleted, if you want to keep searching.
Otherwise I would maybe throw a couple test STLs out to printer service sites and see if you can’t figure out a trend with others who are charging for SLA prints. You don’t have to be accurate, you just need to be competitive. =]
Also don’t forget to factor in your expertise when charging for prints, resin can be expensive, and machine time is limited, but so is your own, value it!
Best of luck!