Using the balance sheet and income statement please calculate the 2021 ratios below

Gross Margin = Gross Profit / Revenue * 100

Earning Margin = Net Income / Turnover * 100

Efficiency Ratio = Standard Hours for Actual Production / Actual Hour Worked * 100

Standard Hours for Actual Production = (Flight equipment + Deposits on flight equipment purchase contracts + Assets constructed for others) * Number of flight hours

Actual Hour Worked = Total number of hours worked by employees

For 2022 Efficiency Ratio this is the example given:

Efficiency Ratio = Standard Hours for Actual Production / Actual Hour Worked * 100

= (6855 + 376 + 28) * 12,696 / 108,430 * 100

Financial Statements and Supplementary Data Southwest Airlines Co. Consolidated Statement of Income (Loss) (in millions, except per share amounts)