Answer:
The predetermined manufacturing overhead rate per direct labor hour will be $32
Explanation:
The formula to compute the predetermined manufacturing overhead rate  is shown below:
= (Estimated manufacturing overhead) Ă· (Estimated direct labor hours)
where,
Estimated manufacturing overhead = Â Wages of factory janitors + Utilities for factory + Rent on factory building
= $39,900 + $17,000 + $13,900
= $70,800
And, the estimated direct labor hours is 2,200 machine hours
Now put these values to the above formula Â
So, the value would equal to
= $70,800 Ă· 2,200 machine hours
= $32.18