Information concerning a product produced by Ender Company appears here: 173 80 Sales price per unit Variable cost per unit Total annual fixed manufacturing and operating costs $613,890 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 $139,500. 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. Req AtoC 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 $139,500. per unit A Contribution margin b. Break-even in units Sales in units MISTON VII c. Sales level in units that Ender must reach to earn a profit of $139,500, 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. Req A to ReqD Determine the margin of safety in units, sales dollars, and as a percentage. (Round "Percentage answer to 1 decimal place (L.e., 0.234 should be entered as 23.4).) Units Sales Percentage Margin of safety