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. If sold now, the current machine would have a salvage value of $11,500. 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. Prepare an incremental analysis to determine whether the current machine should be replaced. fin the first fwo columns, enter costs and expenses as positive amounts, and any a mounts recelved as negative amounts. In the third column, enter net income increases as positive amounts and decreases as negative amounts. Enter negative omounts using elther a negotive sign proceding the number es 45 or parentheses es. (45).) The current machine should be