Lake Cellars produces and sells white wine. The following data concern the three varietals of white wine the company currently offers. Sales data for August are given below: Sauvignon Total Blanc $ 9.60 $ 7.00 19,600 $ 9.90 $ 6.45 21,500 Budgeted selling price Budgeted variable cost Budgeted selling quantity Actual selling price Actual varlable cost Actual selling quantity Chardonnay $ 11.05 $ 8.20 7,300 $ 7.35 $ 8.25 7,500 Riesling 7.50 $ 5.40 12.300 $ 8.00 $ 5.70 12.100 39,200 41,100 Required: a. Compute the sales price variance for all three wines. (Indicate the effect of each variance by selecting "F" for favorable, or "U" for unfavorable. If there is no effect, do not select either option.) Price Variance Variety Sauvignon Blanc Chardonnay Riesling Total variance b. Compute the activity variance for Lake Cellars for August. (Do not round intermediate calculations. Indicate the effect of each variance by selecting "F" for favorable, or "U" for unfavorable. If there is no effect, do not select either option.) Activity variance