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 61 students enrolled in those two courses. Data concerning the company's cost formulas appear below: Instructor wages Classroom supplies. Utilities Campus rent Insurance Administrative expenses Fixed Cost per Month Cost per Course $ 2,960 Cost per Student $ 280 $ 1,240 $ 85 $ 4,900 $ 2,300 $ 4,000 $ 42 $ 6 For example, administrative expenses should be $4,000 per month plus $42 per course plus $6 per student. The company's sales should average $890 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 $ 51,390 Instructor wages $ 11,120 Classroom supplies $ 16,930 Utilities $ 1,990 Campus rent Insurance Administrative expenses Required: $ 4,900 $ 2,440 $ 3,960 1. Prepare the company's planning budget for September. 2. Prepare the company's flexible budget for September. 3. Calculate the revenue and spending variances for September.