Question 4: The Medford Burkett Company uses a responsibility reporting system to measure the performance of its three investment centers: Planes, Taxis, and Limos. Segment performance is measured using a system of responsibility reports and return on investment calculations. The allocation of resources within the company and the segment managers' bonuses are based in part on the results shown in these reports. Recently, the company was the victim of a computer virus that deleted portions of the company's accounting records. This was discovered when the current period's responsibility reports were being prepared. The printout of the actual operating results appeared as follows. Determine the missing amounts.

	Planes	Taxis	Limos
Service Revenue	?	450,000	?
Variable Costs	5,000,000	?	320,000
Contribution Margin	?	180,000	380,000
Controllable Fixed Costs	1,500,000	?	?
Controllable Margin	?	70,000	176,000
Average Operating Assets	25,000,000	?	1,600,000
Return on Investment	12%	10%	?

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