ohnson Enterprises uses a computer to handle its sales invoices. Lately, business has been so good that it takes an extra 3 hours per night, plus every third Saturday, to keep up with the volume of sales invoices. Management is considering updating its computer with a faster model that would eliminate all of the overtime processing. Current Machine New Machine Original purchase cost $15,300 $25,100 Accumulated depreciation $6,200 _ Estimated annual operating costs $24,800 $19,800 Remaining useful life 5 years 5 years If sold now, the current machine would have a salvage value of $10,800. If operated for the remainder of its useful life, the current machine would have zero salvage value. The new machine is expected to have zero salvage value after 5 years.