A-Zone Media sells two models of e-readers. The budgeted price per unit for the wireless model is $212 and the budgeted price per unit for the wireless and cellular model is $456. The master budget called for sales of 12,000 wireless models and 3,500 wireless and cellular models during the current year. Actual results showed sales of 9,500 wireless models, with a price of $300 per unit, and 5,100 wireless and cellular models, with a price of $800 per unit. The standard variable cost per unit is $100 for a wireless model and $260 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.)