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3. value: points 15.00 Exercise 17-23 Sales Mix and Quantity Variances (LO 17-3) A-Zone Media sells two models of e-readers. The budgeted price per unit for the wireless model is $192 and the budgeted price per unit for the wireless and cellular model is $416. The master budget called for sales of 10,000 wireless models and 2,500 wireless and cellular models during the current year. Actual results showed sales of 7,500 wireless models, with a price of $200 per unit, and 4,000 wireless and cellular models, with a price of $400 per unit. The standard variable cost per unit is $80 for a wireless model and $160 fora wireless and cellular model. Required: a. Compute the activity variance for these data. (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