TipTop Flight School offers flying lessons at a small municipal airport. The school's owner and manager has been attempting to evaluate performance and control costs using a variance report that compares the planning budget to actual results. A recent variance report appears below: TipTop Flight School Variance Report For the Month Ended July 31 Actual Planning ResultsBudget Variances 185 Lessons Revenue 180 $36,950 S 36,000 $950 F Expenses Instructor wages Aircraft depreciation Fuel Maintenance Ground facility expenses Administration 11,530 6,475 3,890 2,770 2,095 4,260 11.340 190 U 6,300 175 U 3.420 470 U 2,630 140 U 2,170 75 F 4,360 100 F Total expense 31,020 30,220 800 U Net operating income S 5,930 5,780 $150 F