Listed below are costs of services provided by an airline company. Consider the cost object to be a flight. Flight attendants and pilots are paid based on hours of flight time. Classify each cost as direct, indirect, selling, or general and administrative. Classification Cost 1. Depreciation on office equipment 2. Airport landing fee (per flight) 3. Human resources staff salaries 4. Salesperson commissions 5. Office headquarters rent 6. Office equipment insurance 7. Travel agent salaries 8. Co-pilot wages