I figured it was costing me about 10 bucks for a roll of 24 on my old 35mm by the time I paid for developing, I got about 3 rolls unless the weather was really cold then I was lucky to get 2 rolls out of the batteries which included 4 C's and 2 AA's, Also I was missing alot of pictures cause I had it set on anywhere from 7 to 10 minute intervals just to save film, now with the digital I set it on 1 minute and get alot of good pictures that I was missing.