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 S 200 $ 80 $600,000 Required Determine the following a. Contribution margin per unit ontribution margin per unit b. Number of units that Ender must sell to break even. Break-even in un c. Sales level in units that Ender must reach to earn a profit of $240,000 ales in units