Russo Corporation manufactured 21,000 air conditioners during November The overhead cost- allocation base is $33.75 per machine -hour. The following varlable overhead data pertain to November: Production Machine-hours Variable overhead cost per machine -hour What is the total variable overhead variance? Actual 21.000 units 14,975 hours $33.00 Budgeted 23,000 units 16,100 hours $33.75 OA. $9,281 25 favorable OB. $9.20125 unfavorable O C. $1,950.00 favorable OD. $1,950.00 unfavorable