When Isaiah Company has fixed costs of $108,240 and the contribution margin is $22, the break-even point is a-4,920 units b.5,160 units c.14,910 units d.9,840 units The Dean Company has sales of $181,000, and the break-even point in sales dollars of $139,370. Determine the company's margin of safety percentage. Round answer to the nearest whole number If sales are $823,000, variable costs are 76% of sales, and operating income is $273,000, what is the contribution margin ratio? Cb.72% c.28% C d.7696 t (Ctrl)