3. ABC's income statement is as follows: 2019 2020 Sales (units) 2,600 3,500 Sales revenue $ 130,000 $175,000 Total expenses 110,000 128,000 Net income $ 20,000 $ 47,000 a. Use the high-low method to estimate variable and fixed costs for 2020. (Use 2019 as the low case and 2020 as the high case). b. What assumptions did you make in answering the previous question? c. In what cases might it be unwise to use high-low analysis to estimate cost structure (fixed versus variable)?d. What is the break-even point in units in 2020? e. If advertising expenditure were increased by $6,000 in 2020, resulting in a unit sales price increase of 10%, how would this affect break-even? f. What other factors might management consider before making an investment in advertising? (Consider the effect on operating leverage.)