Answer:
$268 Favorable
Explanation:
Variable overhead variance can be computed by using the following formula,
Budgeted hours = 0.20/unit
Variable overhead efficiency variance
= Standard Overhead rate * (Actual Hours - Standard Hours)
= 6.7 * ( 1,820 - (9300*0.2))
Efficiency variance = $268 Favorable, as actual hours for actual activity are less than standard hours at actual activity.
Hope that helps.