Radon Corporation manufactured 33,000 grooming kits for horses during March. The following fixed overhead data pertain to March: Actual Static Budget Production 33,000 units 30,000 units Machine-hours 6,100 hours 6,000 hours Fixed overhead costs for March $153,000 $144,000 What is the fixed overhead production-volume variance? $14,400 unfavorable $9,000 favorable $9.000 unfavorable $14,400 favorable