A machine purchased 3 years ago for $140,000 is now too slow to satisfy the demand of the customers. It can be upgraded now for $84,000 or sold to a smaller company internationally for $46,000. The upgraded machine will have an annual operating cost of $84,000 per year and a $20,000 salvage value in 3 years. If upgraded, the presently owned machine will be retained for only 3 more years, then replaced with a machine to be used in the manufacture of several other product lines. The replacement machine, which will serve the company now and for a maximum of 8 years, costs $22 Its salvage value will be $52,000 for years 1 through 5; $20,000 after 6 years; and $10,000 thereafter. It will have an estimated operating cost of $45,000 per year. Perform an economic analysis at 8% per year using a specified 3-year planning horizon. a) Determine if the current machine should be replaced now or 3 years from now. b) Once decided, determine the equivalent AW for the next three years. a) The current machine should be replaced . b) The equivalent AW for the next three years is $