Answer: $721 Unfavorable
Explanation:
The following can be deduced from the question:
Actual hours = 3690 hours
Standard hours = 3620 hours
Standard rate per hour = ($14000 + $27200) / 4000
= $41200 / 4000
= $10.30 per hour
Therefore, the overall variable overhead efficiency variance for the month is calculated as:
= (Actual Hours - Standard Hours) × Standard rate per hour
= (3690 - 3620) × $10.30
= 70 × $10.30
= $721 Unfavorable