Information concerning a product produced by Ender Company appears here: 156 82 S Sales price per unit Variable cost per unit Total annual fixed manufacturing and operating costs $451,400 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 $148,000. d. Determine the margin of safety in units, sales dollars, and as a percentage. Complete this question by entering your answers in the tabs below. Reg A to C Req 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 $148,000. per unit a. Contribution margin b. Break-even in units c. Salos in units