PROBLEM 3: Black Pearl, Inc., sells a single product. The company's most recent income statement is given below. Sales Less variable expenses Contribution margin Less fixed expenses Net income $50,000 (30,000) 20,000 (12,500) $ 7,500 Required: a. Contribution margin ratio is % b. Breakeven point in total sales dollars is $ $ C. To achieve $40,000 in operating income, sales must total $ d. If sales increase by $50,000, operating income will increase by $