Tesla management are trying to decide whether to keep an older piece of machinery or buy a replacement. Management was presented with the following information to assist in their decision:

A machine purchased three years ago for $$301,000$ has a current book value using straight$-$line depreciation of $$181,000$; its operating expenses are $$35,000$ per year. A replacement machine would cost $$231,000,$ have a useful life of nine years, and would require $$8,000$ per year in operating expenses. It has an expected salvage value of $$65,000$ after nine years. The current disposal value of the old machine is $$73,000$; if it is kept nine more years, its residual value would be $$19,000.$