With any photo printer, check the running cost and total cost of ownership if you can. Our reviews are helpful in this regard. Snapshot printers often use easy-to-replace packs or cartridges that combine enough photo paper and ink for 20 or 30 prints (those that use ink, that is; more in a minute). Unfortunately, there's no easily found or widely accepted standard for calculating the cost per print for near-dedicated photo printers, many of which can produce images of widely varying sizes or even long panoramas using rolls instead of sheets. To get the cost per photo for a snapshot printer, simply divide the cost of the print pack by the number of photos it produces. To get the total cost of ownership, multiply the cost per photo by the number of photos you expect to print over the device's lifetime, and then add the printer's initial cost. Some inkjet printers, not usually photo-first models, work with automatic ink delivery or subscription services like HP's Instant Ink. These can be great deals for consumers who print a lot of photos, since they charge a flat monthly fee for a given number of prints—whether they be letter-size, borderless photos or pages of double-spaced black text. It's easy in these cases to calculate what a photo print will cost.