Exercise 11-19A (Algo) Margin of safety LO 11-6 Information concerning a product produced by Ender Company appears here: $ Sales price per unit Variable cost per unit Total annual fixed manufacturing and operating costs 155 76 k $545, 100 Required Determine the following: a. Contribution margin per unit. b. Number of units that Ender must sell to break even. c. Sales level in units that Ender must reach to earn a profit of $181700. d. Determine the margin of safety in units, sales dollars, and as a percentage. aces Complete this question by entering your answers in the tabs below. Req A toc Reg D a. Contribution margin per unit. b. Number of units that Ender must sell to break even. c. Sales level in units that Ender must reach to earn a profit of $181,700. per unit a. Contribution margin b. Break-even in units c. Sales in units Reg A to ReqD>