Ritchie Manufacturing Company makes a product that it sells for $140 per unit. The company incurs variable manufacturing costs of $78 per unit. Variable selling expenses are $13 per unit, annual fixed manufacturing costs are $350,000, and fixed selling and administrative costs are $149,800 per year. Required Determine the break-even point in units and dollars using each of the following approaches: a. Use the equation method. b. Use the contribution margin per unit approach. c. Use the contribution margin ratio approach. d. Prepare a contribution margin income statement for the break-even sales volume. Complete this question by entering your ariswers in the tabs below. Determine the break-even point in units and doliars using the equation method, the contribution margin per unit approach and the contribution margin ratio approach