what is the variable overhead efficiency variance? 1-4500 favorable 2-3937.50 favorable 3-4500 unfavorable 4-3937.50 unfavorable

:Answer the following questions using the information below Russo Corporation manufactured 16,000 air conditioners during November. The overhead cost- allocation base is $31.50 per machine-hour. The following variable overhead data pertain to November Budgeted Actual units 18.000 units 16,000 Production hours 9.000 hours 7,875 Machine-hours $31.50 $31.00 Variable overhead cost per machine-houn