EZ-Tax is a tax accounting practice with partners and staff members. Each billable hour of partner time has a $500 budgeted price and $220 budgeted variable cost. Each billable hour of staff time has a budgeted price of $130 and a budgeted variable cost of $70. For the most recent year, the partnership budget called for 8,300 billable partner-hours and 34,700 staff-hours. Actual results were as follows: $3,800,000 7,800 hours revenue Staff revenue $4,450,000 34,000 hours Required a. Compute the sales price variance. (Indicate the effect of each variance by selecting "F" for favorable, or "U" for unfavorable. If there is no effect, do not select either option.) Partner Staff b. Compute the total sales activity variance. (Do not round intermediate calculations. Indicate the effect of each variance by selecting "F" for favorable, or "U" for unfavorable. If there is no effect, do not select either option.) activity c. Compute the total sales mix variance. (Do not round intermediate calculations. Indicate the effect of each variance by selecting "F" for favorable, or "U" for unfavorable. If there is no effect, do not select either option.) ales d. Compute the total sales quantity variance. (Do not round intermediate calculations. Indicate the effect of each variance by selecting ..F" for favorable, or "U" for unfavorable. If there is no effect, do not select either option.) ales quantity