Zany Brainy projected current year sales of $50,000$ units at a unit sale price of $$20\mathrm{.}00.$

Actual current year sales were $55,000$ units at $$22\mathrm{.}00$ per unit. Variable costs were

budgeted at $$14\mathrm{.}00$ per unit and actually totaled $$15\mathrm{.}00$ per unit.

Budgeted fixed costs totaled $$400,000,$ while actual fixed costs amounted to $$420,000.$

a$.$ What is the Zany Brainy's sales volume variance for total revenue?

b$.$ What is the Zany Brainy's flexible budget variance for variable expenses?

c$.$ What is the Zany Brainy's flexible budget variance for operating income?

d$.$ What is the Zany Brainy's sales volume variance for total expenses?