A machine purchased three years ago for $314,000 has a current book value using straightline depreciation of $179,000; its operating expenses are $39,000 per year. A replacement machine would cost $236,000, have a useful life of nine years, and would require $9,000 per year in operating expenses. It has an expected salvage value of $70,000 after nine years. The current disposal value of the old machine is $79,000; if it is kept 9 more years, its residual value would be $19,000. Required Calculate the total costs in keeping the old machine and purchase a new machine. Should the old machine be replaced