Ruth Lewis owns and operates Sunland, 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: (a) What is Sunland's contribution margin per unit? Contribution margin per unit $ per cake (b) What is Sunland's monthly breakeven point in units? (c) What is Sunland's contribution margin ratio? (d) What is Sunland's monthly breakeven point in sales dollars