1. Fixed cost: mainly includes the following parts:

1. Labor costs: mainly including the salaries and welfare expenses of pilots, flight attendants, maintenance personnel and other related personnel.

2. Aircraft depreciation: mainly includes: amortization of aviation material consumption parts, amortization of high-priced turnover parts, depreciation of flight parts, and apportionment of major repairs of flight parts.

3. Meals and shipboard supplies: meals, drinks and other shipboard supplies.

4. Civil aviation infrastructure fund: the expenses stipulated by the state for civil aviation infrastructure.

5. Sales expenses: mainly refers to the commission after the agent contributes to the company's sales.

6. Financial expenses: Financial expenses mainly refer to the interest expenses incurred when the company carries out financial leasing with banks or companies.

Second, the variable cost:

Variable cost mainly refers to the fuel cost consumed in the actual flight segment when the aircraft performs flight. Because the actual fuel consumption of the flight segment is related to the specific total passenger and cargo weight of the day, it is also related to the weather of the day and the performance attenuation of the aircraft, so it can be calculated in detail through the sabre system of AOC, usually within 2 to 3 hours before takeoff.