Das dachte ich mir auch aber:

The number of print lines does not reflect what is actually printed. Spooled files can be canceled or printed with multiple copies. The information in the JB journal entry reflects only what was written by the program. This excludes any lines written for the job log. See the discussion on DP and SP printer file accounting data later in this chapter.

Printer file accounting data for direct print and spooled print

Das Problem ist doch hier, dass man die tatsächlich gedruckten Seiten auswerten möchte und das gibt das Accounting leider nicht her.