Sarah Allen owns and operates Blossom, a bakery that creates personalized birthday cakes for a child's first birthday. The cakes, which sell for $56 and feature an edible picture of the child, are shipped throughout the country. A typical month's results are as follows: Sales revenue $944,720 Variable expenses 708,540 Contribution margin 236,180 Fixed expenses 123,620 Operating income $ 112,560 (a) What is Blossom's contribution margin per unit? Contribution margin per unit $ per cake