Answer:
Efficiency variance = $851 favorable
Step-by-step explanation:
Variable overhead efficiency variance: A variance is the difference between a standard cost and the actual cost. 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
To calculate this variance, we do as follows:
Hours
4,700 should have taken(4,700 × 0.70 hrs) 3,290
but did take (i.e actual hours) 480 3,060
Efficiency variance in hours 70 unfavorable 230 favourable
Standard variable overhead rate × $3.70
Efficiency variance 851
Efficiency variance = $851 favorable