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: Test A Test B Test C Test D Charging rate Variable cost $65 $51 $48 $32 $25 $18 $13 $8 Machine hours 3 2 1 0.5 What is the contribution margin per hour of machine time for Test B? Oa. $18 Ob. $33 Oc. $16.25 Od. $16.50 Oe. $20.50 Previous Next 328 11/12 hp