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 50 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 Cost per Cost per Month Course $3,080 $ 870 $ 130 $ 4,200 $1,890 $ 3,270 $ 15 Student $260 For example, administrative expenses should be $3,270 per month plus $15 per course plus $4 per student. The company's sales should average $800 per student. The company planned to run three courses with a total of 45 students; however, it actually ran three courses with a total of only 42 students. The actual operating results for September appear below: Actual Revenue $ 32,400 Instructor wages $ 9,080 Classroom supplies $ 8,540 Utilities $ 1,530 Campus rent $ 4,200 Insurance $ 1,890 Administrative expenses $ 3,790 Required: 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