Russo Corporation manufactured 20,000 air conditioners during November. The overhead cost-allocation base is $33.25 per machine-hour. The following variable overhead data pertain to November Production Machine-hours Variable overhead cost per machine-hour What is the total variable overhead variance? Actual 20,000 units Budgeted. 22,000 units 12,075 hours $33.00 13,200 hours $33.25 OA. $525.00 favorable OB. $2,493.75 unfavorable OC. $525.00 unfavorable D. $2,493.75 favorable