(Ignore the time value of money in this problem.) Sudbury Eye Specialists is considering the purchase of a new lens grinder to replace a machine that was purchased several years ago. Selected information on the two machines is given below:

Old MachineNew MachineOriginal cost when new$80,000$90,000Accumulated depreciation to date$20,000---Current salvage value$26,000---Annual operating cost$5,000$3,000Remaining useful life4 years4 years

Required:

Compute the total advantage or disadvantage of using the new machine instead of the old machine over the next four years. Assume that neither machine will have any salvage value at the end of four years.