Chow$-4-$Hounds $($C$4$H$)$ makes pet food for sale in supermarkets. C$4$H produces two general types: Branded and Generic. The two differ primarily in the ingredients used. At budget, Branded sells for $$12$ per case and has a variable cost to produce of $$5$ per case. Generic sells for a budgeted $$9$ per case and has a budgeted variable cost to produce of $$4$ per case. C$4$H expects to sell $30$ percent Branded and $70$ percent Generic regardless of the sales volume. C$4$H budgeted total sales of $200,000$ cases for March. Actual case volume sold in March was $210,000$ cases, of which $60,000$ were Branded. Total actual revenues in March were $$2,055,000,$ of which $$780,000$ were from sales of Branded cases.

Required:

a$.$ Compute the activity variance for C$4$H for March.

b$.$ Compute the mix and quantity variances for March.