The printer requires 4 types of toner (Black, Cyan, Magenta, Yellow). Taking paper costs into account, while excluding drum and belt unit changes, printing mono will cost about 2.65c per page. Printing color given same criteria will cost about 13.72c per page. The drum unit has to be changed at 40k
If the 250-sheet tray is not enough, an additional 500-sheet tray can be added for about $250. An identical model with the tray already included is also available and costs about $100 more than the default model.
The printer requires 4 types of toner (Black, Cyan, Magenta, Yellow), a drum unit at 25k pages and belt unit at 50k pages. While by the time the belt unit has to be changed it's cheaper to buy a new printer, the toner, drum unit and paper costs can be kept at about 9c per page.