Ritchie Manufacturing Company makes a product that it sells for $160 per unit. The company incurs variable manufacturing costs of $73 per unit. Variable selling expenses are $15 per unit, annual fixed manufacturing costs are $490,000, and fixed selling and E administrative costs are $258,800 per year. Required Determine the break-even point in units and dollars using each of the following approaches: E 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