Northeast Hospital$$s Radiology Department is considering replacing an old inefficient X$-$ray machine with a state$-$of$-$the$-$art digital X$-$ray machine. The new machine would provide higher quality X$-$rays in less time and at a lower cost per X$-$ray. It would also require less power and would use a color laser printer to produce easily readable X$-$ray images. Instead of investing the funds in the new X$-$ray machine, the Laboratory Department is lobbying the hospital$$s management to buy a new DNA analyzer.

Required:

For each of the items below, indicate by placing an X in the appropriate column whether it should be considered a differential cost, a sunk cost, or an opportunity cost in the decision to replace the old X$-$ray machine with a new machine. If none of the categories apply for a particular item, leave all columns blank