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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: Total Budgeted selling price Budgeted variable cost Budgeted selling quantity Actual selling price Actual variable cost Actual selling quantity Sauvignon Blanc $ 9.40 $ 6.60 19,900 $ 9.30 $ 6.35 21,500 Chardonnay $ 10.60 $ 7.80 7,200 $ 9.65 $ 8.00 7,400 Riesling $ 7.50 $ 5.50 11.900 $ 7.45 $ 5.15 11,800 39,000 40,700 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 c. Compute the mix and quantity variances 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.) Mix variance Quantity variance