If the user buys the consumables for their printer, then it is impossible to know for sure which is cheapest, as it depends entirely on the amount of toner/cartridge coverage on the page – it can range from 1% to over 150% or more coverage.
The only way in which we can work out average running costs is through the ISO [International Organization for Standardization] toner/cartridge yields, which allows us to work out how much it costs to print a standard PDF document. From this information, we can then say that one machine is cheaper to run than another.
Should a customer need their print costs to be at a guaranteed price, then the only option in a Managed Print Service [MPS], which allows you to get a set cost per page printed.