Kimberly Young owns and operates Crane, a bakery that creates personalized birthday cakes for a child's first birt which sell for $60 and feature an edible picture of the child, are shipped throughout the country. A typical month's follows: Sales revenue $950.400 Variable expenses 712.800 Contribution margin 237.600 Fixed expenses 128,400 Operating income $ 109.200 (b) What is Crane's monthly breakeven point in units