Dorothy Taylor owns and operates SandhillCakes, a bakery that creates personalized birthday cakes for a child's first birthday. The cakes, which sell for $40 and feature an edible picture of the child, are shipped throughout the country. A typical month's results are as follows: Sales revenue Variable expenses Contribution margin Fixed expenses Operating income $796,000 597.000 199,000 109,500 $ 89,500 (a) How many cakes will Dorothy Taylor have to sell if she wants to earn $144,000 in operating income each month? cakes