Information concerning a product produced by Campbell Company appears here: Sales price per unit Variable cost per unit Total annual fixed manufacturing and operating costs $ 156 $ 78 $538,200 Required Determine the following: a. Contribution margin per unit. b. Number of units that Campbell must sell to break even. c. Sales level in units that Campbell must reach to earn a profit of $124,800. a. Contribution margin per unit b. Break-even in units C. Required sales in units