The Sterling Tire Company's income statement for 20XX is as follows: STERLING TIRE COMPANY Income Statement Year ended December 31, 20XX Sales (20,000 tires at $60 each) Less: Variable costs 20.000 tires at $30) $ 1.200,000 600,000 Contribution margin Less: Fixed costs 600,000 400,000 Earnings before interest and taxes (EBIT) Interest expense 200.000 50,000 Earnings before taxes (IT) Income tax expense (341) 150,000 51.000 Earning after taxes (ET) $ 99,000 Given this income statement, compute the following: a. Degree of operating leverage. (Round the final answer to 2 decimal places.) DOL b. Degree of financial leverage. (Round the final answer to 2 decimal places.) DFL C-1. Degree of combined leverage. (Do not round the intermediate calculations. Round the final answer to 2 decimal places c-2. Using your answers to a, and b, calculate the percentage increase in EBIT and EBT from a 20 percent increase in sales volume (Do not round the intermediate calculations, Round the final answers to 2 decimat places.) c-3. Does financial or operating leverage have the greater impact? ODOL DFL d. Break-even point in units. (Round the final answer to the nearest whole number.) Break-even point tires e. Break-even point considering the interest expense as a fixed cost. Break-even point tires