"Zero Turbulence Airline provides air transportation services between Los Angeles, California, and Kona, Hawaii. A single Los Angeles to Kona round-trip flight has the following operating statistics: Fuel $15,961 Flight crew salaries 12,226 Airplane depreciation 5,773 Variable cost per passenger—business class 60 Variable cost per passenger—economy class 50 Round-trip ticket price—business class 550 Round-trip ticket price—economy class 310"