A-Zone Media sells two models of e-readers. The budgeted price per unit for the wireless model is $196 and the budgeted price per unit for the wireless and cellular model is $424. The master budget called for sales of 10,400 wireless models and 2,700 wireless and cellular models during the current year. Actual results showed sales of 7,900 wireless models, with a price of $220 per unit, and 4,300 wireless and cellular models, with a price of $480 per unit. The standard variable cost per unit is $84 for a wireless model and $180 for a wireless and cellular modeL Required: a. Compute the activity variance for these data. b. Compute the mix and quantity variance for these data. (Enter your answers rounded to the nearest whole dollar.) Complete this question by entering your answers in the tabs below. Required A Required B 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.) vity vari Required A Required B