Page 132 - BA2 Integrated Workbook STUDENT 2018
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Chapter 7




               2.4   Variable overhead variances
                                                                 Variable overhead

                                                               expenditure variance
                            Variable overhead

                               total variance
                                                                 Variable overhead
                                                                 efficiency variance


               Variable overhead expenditure variance

               The variable overhead expenditure variance reveals how much of the variable
               overhead total variance was caused by paying a different hourly rate of overhead for
               the hours worked.

                                                                                $
               83,000 hours should have cost (× $3)                         249,000
               But did cost                                                 248,200
                                                                             ———–
               Variable overhead expenditure variance                           $800      favourable
                                                                             ———–
               Variable overhead efficiency variance

               The variable overhead efficiency variance reveals how much of the variable
               overhead total variance was caused by using a different number of hours of labour,
               compared with the standard allowance for the production achieved. Its calculation is
               very similar to the calculation of the labour efficiency variance.
               Variance in hours (from labour efficiency)                      1,000      favourable
                                                                             ———
               × standard rate per hour ($3):
               Variable overhead efficiency variance                         $3,000       favourable
                                                                             ———

               Variable overhead total variance = $800 favourable + $3,000 favourable = $3,800
               favourable.



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