Answer:
Option c is correct
Fixed overhead cost variance = $18,000 unfavorable
Explanation:
The fixed overhead costs variance is the difference between the absorbed overheads and actual fixed cost incurred
Absorbed fixed overhead =FOAR × actual output
FOAR - fixed overhead absorption rate = $8.00 per unit
Absorbed overhead = $8.00 per unit × 40,000 = $320000
Actual overhead cost $338,000
Fixed overhead cost variance $18,000 unfavourable