Answer:
C. $28,950 Unfavorable
Step-by-step explanation:
The calculation of spending variance for manufacturing overhead is given below:-
Budgeted manufacturing overhead for actual activity = Manufacturing overhead + (Actual level of activity × Machine per hour)
= $32,200 + (7,770 × $66)
= $545,020
Spending variance for manufacturing overhead = Actual Manufacturing overhead for the month - Budgeted manufacturing overhead for actual activity
= $573,970 - $545,020
= $28,950 Unfavorable