Please show formulas and please use EXCEL

E2) Singler Manufacturing is considering a new machine that costs $250,000. The machine would reduce pretax manufacturing costs by $90,000 annually. The machine falls in the MACRS 3- year class for depreciation, and management estimates a salvage value of $23,000 at the end of 5 years of operation. The machine will cause a one-time increase of net operating working capital of $25,000 initially, which would be recovered at the end of the machine's 5-year life. Singler's marginal tax rate is 40% and its WACC is 10%. a) Should the firm invest in the new machine? Page 3 of 4 Homework #5 b) Suppose management is unsure about the pretax manufacturing cost savings, what is the minimum cost savings the machine should generate in order to break even