Lake cellars produces and sells white wine the following data concern the three varietals of wihte wine the company currently offers. Sales data for August are given as follows: Sauvignon Blanc Chardonnay Riesling Total
Budgeted selling price $9.7 $11.2 $7.7
Budgeted variable cost $7.15 $8.45 $6.05
Budgeted selling quantity 19,300 7,300 11,200 37,800
Actual selling price $9.9 $7.3 $8.3
Actual variable cost $6.45 $8.7 $6.1
Actual selling quantity 20,900 7,500 11,000 39,400

Required:
a. Compute the sales price variance for all three wines.
b. Compute the activity variance for Lake Cellars for August.
c. Compute the mix and quantity variances for Lake Cellars for August.