Answer:
Results are below.
Explanation:
First, we need to calculate the predetermined overhead rate for the period:
Predetermined manufacturing overhead rate= total estimated overhead costs for the period/ total amount of allocation base
Predetermined manufacturing overhead rate= (80,000*4) / 20,000
Predetermined manufacturing overhead rate= $16 per unit
Now, we can allocate overhead to each month:
Allocated MOH= Estimated manufacturing overhead rate* Actual amount of allocation base
January= 6,000*16= $96,000
February= 7,000*16= $112,000
March= 3,000*16= $48,000
April= 4,000*16= $64,000
The total unitary manufacturing costs are constant:
Total unitary manufacturing cost= 12 + 16
Total unitary manufacturing cost= $28