Sales Mix and Quantity Variances: Personna, Inc., sells two models of personal hair care kits. The Basic model has a price of $10.35 per unit, while the Ultra model has a price of $24.60 per unit. The master budget called for sales of 400,000 Basics and 180,000 Ultras during the current year. Actual results showed sales of 300,000 Basics, with a price of $10.40 per unit, and 200,000 Ultras, with a price of $24.75 per unit. The standard variable cost is $5 per unit for a Basic and $10 per unit for Ultras.

Required:

a. Compute the activity variance for these data.

b. Break down the activity variance into mix and quantity parts.