Respuesta :
Answer:
Efficiency variance  $645  unfavorable
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. Â
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: Â
                                               Hours
8,200 units should have taken (8,200 × 0.50 hrs)       4,100
but did take                                      4,250
Variance in hours                                 150 unfavorable
Standard rate                                 ×   $4.30   Â
Efficiency variance                                $645  unfavorable