Russo Corporation manufactured 21,000 air conditioners during November. The overhead cost-allocation base is $34.25 per machine-hour. The following variable overhead data pertain to November Production Machine-hours Variable overhead cost per machine-hour What is the variable overhead spending variance? Actual 21,000 units Budgeted 24,000 units 13,300 hours 14,400 hours $34.00 $34.25 A. $3,600.00 unfavorable B. $3,325.00 favorable C. $3,600.00 favorable OD. $3,325.00 unfavorable