Agrigrow is to purchase a tractor for over-the-road hauling for $90,000. It is expected to be of use to the company for 6 years, after which it has a salvage value for $4,000. Transportation cost savings are expected to be $63,000 per year, including fuel, maintenance, insurance, and the like. The company's marginal tax rate is 40 percent, and MARR is 10 percent on after-tax cash flows. Suppose that, to Agrigrow's surprise they dispose of the tractor at the end of the fourth year for $6,000. Develop tables to determine the ATCF for each year after tax PW, AW, and IRR after only 4 years.