E$7-14$ Johnson 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 $$15,000$ $$25,000$ Accumulated depreciation $ $6,000$ Estimated annual operating costs $$25,000$ $$20,000$ Remaining useful life $5$ years $5$ years If sold now, the current machine would have a salvage value of $$6,000.$ 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. Instructions Should the current machine be replaced?