Exercise 11-19 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 $168 $87 costs Requirec Determine the followlng a. Contribution margin per unit. tribution margin per unit b. Number of unlts that Ender must sell to break even. ak-even in units c. Sales level In units that Ender must reach to earn a profit of $267,300. les in units d. Determine the margin of safety In units, sales dollars, and as a percentage. (Round "Percentage" answer to 1 declmal place (I.e. 0.234 should be entered as 23.4).) Units Units Sales Percentage Margin of safety