Final answer:
To calculate the predetermined overhead rate, divide total indirect overhead costs by the expected production in units for the first four months.
Step-by-step explanation:
To calculate the predetermined overhead rate, you need to divide the total indirect overhead costs by the expected production in units for the first four months. In this case, the total indirect overhead costs are $156,600 per month.
The expected production in units for each month is as follows: January - 4,700 units, February - 7,100 units, March - 4,900 units, and April - 6,500 units. So, the predetermined overhead rate for each month would be:
January: $156,600 / 4,700 = $33.33 per unit
February: $156,600 / 7,100 = $22.05 per unit
March: $156,600 / 4,900 = $31.96 per unit
April: $156,600 / 6,500 = $24.10 per unit
To allocate overhead costs to each month, you need to multiply the predetermined overhead rate by the expected production in units for each month. This will give you the overhead costs for each month.
For example, in January: $33.33 x 4,700 = $156,651
Similarly, you can calculate the overhead costs for February, March, and April.
To calculate the total cost per unit for each month, you need to add the direct manufacturing costs per unit to the overhead costs per unit. In this case, the direct manufacturing costs per unit are $15. So, the total cost per unit for each month would be:
January: $15 + $33.33 = $48.33
February: $15 + $22.05 = $37.05
March: $15 + $31.96 = $46.96
April: $15 + $24.10 = $39.10