I play these games too. It can be fun and informative. As for what you have figured, I say that it is definitely a good deal more expensive than that to print. You should include test prints/attempts, IMO. They are most of the cost of printing. Also, what about film processing cost? Additionally, how many shots per roll are you actually printing, on average? IMO, the cost of shooting and processing the shots that are not printed must be added to the shots that are. In other words, if you shoot a $5 roll of 36 frames, spend $8 to have it processed, and print five frames from the roll, you are paying $2.65 per print before you have even started making the prints. If you do your own processing, and use your developer to full capacity a roll of 35mm costs under a dollar to process, however. Also, the more print-worthy shots you have per roll, the lower the cost per print becomes.