EZ-Tax is a tax accounting practice with partners and staff members. Each billable hour of partner time has a $560 budgeted price and $280 budgeted variable cost. Each billable hour of staff time has a budgeted price of $120 and a budgeted variable cost of $70. For the most recent year, the partnership budget called for 8,400 billable partner-hours and 34,700 staff-hours. Actual results were as follows. Partner revenue $ 4,248,000 7,800 hours Staff revenue $ 4,105,000 34,000 hours Required: a. Compute the sales price variance. b. Compute the total sales activity variance. c. Compute the total sales mix variance. d. Compute the total sales quantity variance.