Answer:
-$15,000 favorable variance
Step-by-step explanation:
variable overhead efficiency variance = standard overhead rate x (actual hours - standard hours)
- standard variable overhead rate = $150,000 / 30,000 = $5
- actual hours 15,000
- standard hours 18,000
variable overhead efficiency variance = $5 x (15,000 - 18,000) = $5 x (-3,000) = -$15,000 favorable variance