Roberds Tech is a for-profit vocational school. The school bases its budgets on two measures of activity (i.e., cost drivers), namely student and course. The school uses the following data in its budgeting: Revenue Faculty wages Course supplies Administrative expenses Fixed element Variable element Variable element per month per student per course $ 0 $ 198 $ 0 $ 0 $ 0 $2,900 $ 0 $ 32 $ 20 $ 25,500 $ 7 $ 32 In March, the school budgeted for 1,710 students and 68 courses. The school's income statement showing the actual results for the month appears below: Roberds Tech Income Statement For the Month Ended March 31 Actual students 1,610 Actual courses 71 Revenue $311,340 Expenses: Faculty wages 204,950 Course supplies 52,590 Administrative expenses 39,562 Total expense 267,102 Net operating income $ 14,238 Required: (a) Calculate the activity variance for revenue for March. Label the variance as favorable or unfavorable. (b) Calculate the spending variance for Administrative expenses for March. Label the variance as favorable or unfavorable