Question 5. (18 points) Sabor Inc. is a medical testing laboratory that performs several tests and analyses for hospitals in the area. Four of the tests that they perform require the use of a specialized machine that can supply 14,000 hours per year. Information on the four lab tests follows: Revenue Variable cost Machine hours Test A Test B Test C Test D $67 $52 $48 $22 $25 $28 $13 $8 3 2 0.5 What is the contribution margin per hour of machine time for each of the tests? What order would you perform the test if demand exceeded the available machine hours? 1st 2nd 3rd 4th