View Policies Show Attempt History Current Attempt in Progress Betty Harris owns and operates Cullumber, a bakery that creates personalized birthday cakes for a child's first birthday. The cakes, which sell for $65 and feature an edible picture of the child, are shipped throughout the country. A typical month's results are as follows: Sales revenue $962.000 Variable expenses 577,200 Contribution margin 384,800 Fixed expenses 211.640 Operating income $173,160 Ca