Bonza Airlines is in the process of preparing a contribution margin income statement that will allow a detailed look at its variable costs and profitability of operations. Which of the following cost combinations should be used to evaluate the variable cost per flight of the company$$s Sunshine Coast to Proserpine flights?

Group of answer choices

Communication system operation, food service, and ramp personnel.

Airplane depreciation, baggage handling, and airline marketing.

Flight crew salary, fuel, and engine maintenance.

Fuel, food service, and airport landing fees.