Answer:
Results are below.
Step-by-step explanation:
We weren't provided with the number of machine-hours. To guide an answer, I will assume that 35,000 machine hours were estimated in the Fabrication Department.
To calculate the predetermined manufacturing overhead rate we need to use the following formula:
Predetermined manufacturing overhead rate= total estimated overhead costs for the period/ total amount of allocation base
Predetermined manufacturing overhead rate= 84,000 / 35,000
Predetermined manufacturing overhead rate= $2.4 per machine hour