The following is Billy Corporation's contribution format income statement for last month: The Company has sold 20,000 units during the month. a. What is the company's contribution margin ratio? (3 points) b. What is the company's break-even in units? (3 points) c. How many units would the company have to sell to attain a target profit of $125,000 ? (3 points) d. What is the company's margin of safety in dollars? (3 points) e. What is the revised net operating income if unit sales increase by 20% and fixed expenses increase by 20,000 ? (4 points)