Kodak pride themselves on offering premium ink cartridges at a low cost. Unlike some printer manufacturers, Kodak try to keep things simple and deliberately try to avoid confusion with ink cartridge identification by not having a huge range of different printer inks that fit their Kodak printer machines.
Kodak ink cartridge identification marks are easy recognisable by either the numbers 10 or 30. Within those inkjet cartridge ranges there are further cost saving options such as Kodak Combo packs which save you money when buying a black and a colour ink cartridge together.
Also if you get through a lot of Kodak printer ink, it is definitely worth paying the extra for the XL versions of the ink cartridges which although more expensive in purchase price, contain more ink thereby giving you a lower cost per page output.