Question 8 of 13 View Policies Current Attempt in Progress -/4 Sandra Robinson owns and operates Oriole, a bakery that creates personalized birthday cakes for a child's first birthday. The cakes, which sell for $50 and feature an edible picture of the child, are shipped throughout the country. A typical month's results are as follows: Sales revenue $636,500 Variable expenses 483,740 Contribution margin 152,760 Fixed expenses 97,560 Operating income $55,200 (a)