Astro Airlines provides flyovers of Minute Maid Stadium and downtown for tourists. Data concerning the company's operations in July appear below: Astro Airlines Operating Data For the Month Ended July 31 Actual Flexible Planning Results Budget Budget 58 58 56 Flights (9) $ 16,200 $ 19,720 $ 19.040 Revenue $340.009) Expenses Wages and salaries ($3,600 + $88.00) Fuel ($33.009) Airport fees ($880 + $33.009) Aircraft depreciation ($11.009) Office expenses ($250 + $1.009) Total expense Net operating income 8.668 8.528 2 078 1.914 1,848 2.679 2,794 638 306 14,5392 14,35814,026 $ 1,661 S 5,362 $ 5,014 Tourists can purchase tickets individually or hire an entire plane at a discount. Astro Airlines measures its activity in terms of flights