Answer:
Predetermined manufacturing overhead rate= $1.45 per unit
Step-by-step explanation:
First, we will calculate the variable overhead per unit:
Unitary variable overhead= Indirect materials + Utilities
Unitary variable overhead= 0.5 + 0.25
Unitary variable overhead= $0.75 per unit
Now, the total fixed overhead, and fixed overhead rate:
Predetermined manufacturing overhead rate= total estimated overhead costs for the period/ total amount of allocation base
Total fixed overhead= Supervisory salaries + Building rent
Total fixed overhead= 60,000 + 80,000
Total fixed overhead= $140,000
Predetermined manufacturing overhead rate= 140,000 / 200,000
Predetermined manufacturing overhead rate= $0.7 per unit
Finally, the total predetermined overhead rate:
Predetermined manufacturing overhead rate= 0.75 + 0.7
Predetermined manufacturing overhead rate= $1.45 per unit