Comfi Airways, Inc., a small two-plane passenger airline, has asked for your assistance in some basic analysis of its operations. Both planes seat 10 passengers each, and they fly commuters from Comfi's base airport to the major city in the state, Metropolis. Each month, 40 round-trip flights are made. Shown below is a recent month's activity in the form of a cost-volume-profit income statement. Fare revenues (400 passenger flights) $48,000 Variable costs Fuel $14,188 Snacks and drinks 710 Landing fees 2,000 Supplies and forms 1,150 18,048 Contribution margin 29,952 Fixed costs Depreciation 3,050 Salaries 14.668 Advertising 600 Airport hanger fees 1.650 19,968 Net income $9,984