please show all work and equations.

Terminal cash flow: Replacement decision Russell Industries is considering replac ing a fully depreciated machine that has a remaining useful life of 10 years with a newer, more sophisticated machine. The new machine will cost $200,000 and will require $30,000 in installation costs. It will be depreciated under MACRS using a 5-year recovery period (see Table 4.2 on page 112 for the applicable depreciation percentages). A $25,000 increase in net working capital will be required to support the new machine. The firm's managers plan to evaluate the potential replacement over a 4-year period. They estimate that the old machine could be sold at the end of 4 years to net $15,000 before taxes; the new machine at the end of 4 years will be worth $75,000 before taxes. Calculate the terminal cash flow at the end of year4 that is relevant to the proposed purchase of the new machine. The firm is subject to a 40% tax rate. P11-15