I am trying to determine cost of ink per greeting card that I sell. I found a PDF about it on Canon's site (screenshot below) but I don't understand it. The numbers vary so wildly between 4x6 photo sets and 11x14. It seems like this is saying that only 51 pages are yielded for Cyan with an 11x14 document but 482 are yielded for 4x6 photo sets. I print a 7x10 card.
