Rollers Baked Goods makes artisan buns for high end restaurants in the area. The buns are made in standard batches of 100 buns. To bake a batch of buns, the production manager must setup the mixers and ovens. Setup costs are batch-level costs because they are associated with the batches of buns made rather than the individual buns made.

Setup overhead costs consist of some costs that are variable and some costs that are fixed with respect to the number of setup hours. The original static budget plan for April was to produce 12,500 buns. However, with sudden closure of in-dining due to COVID, the actual production was reduced to 11,550 buns.

The following information also relates to April.

Actual Static budget

AmountsAmounts

Batch size (number of buns per batch)110100

Setup hours per batch3.64

Variable overhead cost per setup hour$33$30

Total fixed setup overhead costs$39,240$38,250

Required:

a.Calculate the rate and efficiency variances for variable setup overhead costs.

b.Calculate the rate and production-volume variances for fixed setup overhead costs.