For models 8700W, 27A0, FW870 toner yield is 3,625 linear feet/cartridge and developer yield is 107,956 square feet/2 bags based on 24? x 36? size paper and 6% image density., For models 7700W, 7800W, A040, A041, FW770, FW780 toner yield is 3,626 linear feet/cartridge and developer yield is 107,596 square feet/2 bags based on 24? x 36? size paper, 6% image density.