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"A highway contractor is considering buying a new trenchexcavator that costs $222,000 and can dig a 3-foot-wide trench atthe rate of 15 feet per hour. The annual number of feet to dig eachyear is 5,300. The machine's production rate will remain constantfor the first 2 years of the operation and then decrease by 3 feetper hour for each additional year. The maintenance and operatingcosts will be $72 per hour. The contractor will depreciate theequipment with a five-year MACRS. At the end of 5 years, theexcavator can be sold for $84,000. The contractor will earn anadditional annual revenue of $112,000 with this new machine.Assuming the contractor's tax rate is 21% per year, determine thenet present worth of the cash flow from this machine. The company'sMARR is 14%."