Answer:
The answer is B.$21.19 per machine hour.
Explanation:
We have the expected total overhead cost next years = Total expected indirect labor + Total expected factory utilities = 8,320,000 + 155,500 = $8,475,500.
Total expected machine hour = 400,000 hours.
The company's plantwide overhead rate = Expected total overhead cost next years/ Total expected machine hour ( which is an overhead allocation base) = $8,475,500 / 400,000 = $21.19 per machine hour ( round to two decimal places).
So, the answer is B.$21.19 per machine hour.