The C770n and C772n offer several supplies options, to include both regular yield and high yield toner cartridges. High yield toner cartridges will be most appropriate for heavier printing. Standard cartridges will best fit those customer sensitive to the up front acquisition price of cartridges. The C772n can also use extra high yield cartridges. The X772e has several supplies options, to include regular yield, yield toner and extra high yield cartridges.