Answer:
$750 Unfavorable
Step-by-step explanation:
The calculation of variable overhead efficiency variance is shown below:-
Variable overhead efficiency variance = (Actual direct labor hours - Standard hours allowed) × (Variable factory overhead ÷ Factory overhead rate)
= (10,000 hours - 9,500 hours) × ($18000 ÷ 12000)
= 500 hours × $1.5
= $750 Unfavorable
Therefore for computing the variable overhead efficiency variance we simply applied the above formula.