Ex6- 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: Actual Budgeted Production 21,000 units 24,000 units Machine-hours 13,300 hours 14,400 hours Variable overhead cost per machine-hour: $34.00$34.25 What is the variable overhead spending variance? 1. Determine the variable overhead spending variance 2. Indicate if the variance unfavourable or favourable 3. Comment in the results is requirement