Canon imageCLASS MF7280 Reference Manual page 194

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5-24 Department ID Management
Press [Clear All Totals].
To clear one page total at a time by Department ID, press [▼] or [▲] to display
the desired Department ID ➞ select the Department ID ➞ press [Clear].
Press [Yes].
If you do not want to clear the page totals, press [No].