Lexmark CX725
This setting displays the amount of pages printed in mono.
Enter the Diagnostics menu, and then touch Printer Setup.
View the printed page count for mono.
Lexmark CX/CS8xx_72x and XC/Cxxxx: Asset Report Not Counting Mono Pages
Lexmark C/XC41xx and CS/X72x: Print Quality Diagnosis ? Vertical White Lines on a Printed Page