Facility Management in a manufacturing environment recently installed software allowing it to track printing and copying from virtually all printers, copiers, or multi-functional devices (MFD) The intent is to improve resource control and charge back for the printing and copying performed by users. Which type of charge back system is logical choice for this scenario?

A) actual direct cost plus overhead

B) Flat fee negotiated rates

C) External market based pricing

D) An allocation base on space occupied