rate contract for the purchase of hp cartridges for various printers , hp cartridges for various printers , cartridge 12 a ( q 2612 a black ) , cartridge 88 a ( cc-388 a black ) , cartridge set of ce 400 a black, 401 ac cyan, 402 ac yellow, 403 ac megenta , toner cartridge hp 18 a , cartridge set ofhp ce 410a black, ce 411ac ( cyan ) ce 412 ac ( megenta ) ce 413 ac yellow , cartridge nohp ce 410a black, , cartridge no ce 411ac ( cyan ) , cartridge no ce 412 ac ( megenta ) , cartridge no ce 413 ac yellow , cartridge set of black, yellow, magenta, cyan ( printer hp black 975 ) , toner cartridge hp 36a black ( printer hp-p-1505 ) , drum hp laserjet printer 19a