HP LaserJet M9040M9050 Multifunction Printer series - Manual (Page 25)

Usage Page
The Usage Page screen gives a page count for each size of media that has passed through the product,
as well as the number of duplexed pages. The total is calculated by multiplying the sum of the print count
values by the Units value.
The information on this screen can be used to determine how much toner or paper to keep on hand.
The following illustration and table describe how to use this screen.
Figure 2-5 Usage Page 1 of 2
ENWW Usage Page 13