Answer:
The answer is b.$165,000
Step-by-step explanation:
Please find the below for detail explanations and calculations:
As Grey's predetermined overhead rate is based on machine hours, it is calculated as:
Predetermined overhead rate = Estimated overhead costs / Estimated machine hours = 220,000 / 20,000 = $11 per a machine hour.
The amount credited to the factory overhead account for the year for Grey is calculated as:
Overhead cost = Predetermined overhead rate x Actual machine hour = 11 x 15,000 = $165,000.
Thus, the answer is b.$165,000