For us its £1,625 a quarter based on a calculated 94,000 pages printed per quarter (84k black and white @ £0.011 per print, 10k colour @ £0.069 per print). This price includes everything incl toner, maintenance, new printers, backup printers, software.
If we print more than 94k pages the excess cost per print is £0.0044 b&w and £0.044 colour. If we print less than 94k the £1,625 quarterly charge is reduced for the next quarter in line with actual volume.