80 Hours 4 5 9 9 9 9 = 40 hrs. 0 0 9 9 9 9. Since you want to keep the hours worked in the pay period at 80, the new 9/80 schedule must be implemented for the whole pay period. Because the pay period isnât the same as the workweek, the new 9/80 schedule wonât be starting at the beginning of the workweek.