Answer:
d. $22.20
Explanation:
Calculation to determine what the pre-determined overhead rate for September should be:
Using this formula
Predetermined overhead rate = Variable overhead rate per direct labor hour + Estimated fixed manufacturing overhead/Estimated direct labor hour
Let plug in the formula
Predetermined overhead rate=$8.10 + ($74,730/5,300)
Predetermined overhead rate= $8.10+$14.1
Predetermined overhead rate= $22.20 per direct
Therefore the pre-determined overhead rate for September should be:$22,20