I specialise in education MPS and just came across a Lincoln based copier dealer that begins with a D and ends in wood, the customers thinks they maybe paying a bit much, they have 2 x Samsung mono A4 printers, bearing in mind these are £550 each to purchase outright, they pay £0.014 per print based on 150K per quarter for 12 quarters, lets do the maths.... 150,000 x 12 x £0.014 = £25200.00.
Say that it costs the supplier £0.06 pence to supply toner and service the kit, thats £14400 Profit !