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For example, administrative expenses should be $3,900 per month plus $43 per course plus $4 per student. The company's sales should average $870 per student. The company planned to run four courses with a total of 62 students; however, it actually ran four courses with a total of only 56 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 For example, administrative expenses should be $3,900 per month plus $43 per course plus $4 per student. The company's sales should average $870 per student. The company planned to run four courses with a total of 62 students; however, it actually ran four courses with a total of only 56 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