Help with answering these 2 requirements for Cost Accounting

The Mahoney Company has two producing departments: Assembly and Finishing. The company has been using a plantwide predetermined overhead rate based on direct labor hours. The following estimates were made for the current year:

Assembly Finishing Total

Manufacturing overhead $200,000 $100,000 $300,000

Direct labor hours 40,000 35,000 75,000

Machine hours 5,000 16,000 21,000

Mahoney stated and completed Job 1512 during the year. The job-order cost sheet indicated the following:

Materials requisitioned $18,000

Direct labor cost 16,000

Direct labor hours

Assembly 1700 hours

Finishing 1300 hours

Machine hours:

Assembly 1,000 hours

Finishing 700 hours

A total of 2,000 units were produced on Job 1512

Required: a. Assume that Mahoney uses a plantwide predetermined overhead rate based on direct labor hours. Calculate the total cost and the unit cost for each of the 2,000 units produced by Job 1512.

b. Assume that Mahoney uses separate departmental overhead rates based upon direct labor hours for Assembly and upon machine hours for Finishing. Calculate the total cost and the unit cost for each of the 2,000 units produced by Job 1512.