The Gourmand Cooking School runs short cooking courses at its small campus. Management has identified two cost drivers it uses in its budgeting and performance reportsthe number of courses and the total number of students. For example, the school might run two courses in a month and have a total of 61 students enrolled in those two courses. Data concerning the companys cost formulas appear below: Fixed Cost per Month Cost per Course Cost per Student Instructor wages $ 2,950 Classroom supplies $ 270 Utilities $ 1,230 $ 70 Campus rent $ 5,100 Insurance $ 2,200 Administrative expenses $ 3,900 $ 45 $ 5 For example, administrative expenses should be $3,900 per month plus $45 per course plus $5 per student. The companys sales should average $880 per student. The company planned to run four courses with a total of 61 students; however, it actually ran four courses with a total of only 57 students. The actual operating results for September appear below: Actual Revenue $ 50,780 Instructor wages $ 11,080 Classroom supplies $ 16,320 Utilities $ 1,920 Campus rent $ 5,100 Insurance $ 2,340 Administrative expenses $ 3,811 Required: Prepare a flexible budget performance report that shows both revenue and spending variances and activity variances for September. (Indicate the effect of each variance by selecting "F" for favorable, "U" for unfavorable, and "None" for no effect (i.e., zero variance). Input all amounts as positive values.)