A manufacturing firm uses a perdetermined manufacturing overhead rate to allocate overhead to indiividual jobs, based on machine hours required. At the begining of 2019, the firm expected to incur the follwing.

Manufacturing overhead costs 600,000

direct labor cost 1,500,000

machine hours 75,000 hours

At the end of 2019, the firm had actually incurred

Direct labor cost 1,210,000

Depreciation on manufacturing propery plant and equipment 480,000

sale salaries 25,000

deliverly drivers wages 15,000

plant janitors wages 10,000

machine hours 55,000

Required

a) calculate the firms predetermined manufacturing overhead rate

b) post the manufacturing overhead transactions to the manufacturing overhead t-account and determine the amount of underallocated or overallocated overhead.

c) close the manufacturing overhead account to cost of goods sold