For the cost I spent on ink/paper it's about 5.5 cents for 4x6, 10c for 8x10 and about 50c for a 13x19. However, I'm not in it for the money. To have complete control is the best reward.
Yeah, if it was that cheap for me, I would be still printing at home too(the paper alone cost more than that for me). I have color corrected monitors to help the Costco process. I lose out on the instant gratification factors of home print, but OK with that 
another issue would be pigment vs dye prints... pigment costs so much more.
" lol

