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 reports-the 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 63 students enrolled in those two courses. Data concerning the company's cost formulas appear below: For example, administrative expenses should be $3,500 per month plus $46 per course plus $7 per student. The company's sales should average $880 per student. The company planned to run four courses with a total of 63 students, however, it actually ran four courses with a total of only 55 students. The actual operating results for September were as follows: 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 omounts os positive values.)