Answer:
Variable overhead efficiency variance = $408 Favorable
Step-by-step explanation:
Variable overhead efficiency variance: Variable overhead efficiency variance aims to determine whether or not their exist savings or extra cost incurred on variable overhead as a result of workers being faster or slower that expected.
Since the variable overhead is charged using labour hours, any amount by which the actual labour hours differ from the standard allowable hours would result in a variance
Hours
3,400 units should have taken (3,400×0.4 hours) 1,360
but did take 1,190
Labour hours variance 170 favorable
Standard variable overhead rate × $ 2.40 per hour
Variable overhead efficiency variance $408Favorable
Variable overhead efficiency variance = $408 Favorable