The following graph shows the drum life for printing in Letter and Legal formats: 45000 40000 35000 Engine, total page count 30000 25000 20000 15000 10000 5000 0 0 4 8 12 16 20 24 Pages/job 4-color simplex Letter 4-color duplex Letter Monocolor simplex Letter Monocolor duplex Letter 4-color simplex Legal 4-color duplex Legal Monocolor simplex Legal Monocolor duplex legal Figure 4-2 OPC life 82 Printer maintenance C7085-90921