Which of the following statements is false? Multiple Choice Selling costs are included in a contribution format income statement. Selling costs are included in manufacturing overhead. O Selling costs can be either direct or indirect costs, Selling costs can be either variable or fixed costs. Assume the following information: Sales Variable expenses Contribution margin Fixed expenses Net operating income Amount $ 300,000 120,000 180,000 60,000 $ 120,000 Per Unit $ 40 16 $ 24 The degree of operating leverage is: Multiple Choice 0.67 2.50 1.50