5. thermal system design

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18M Corporation purchased a vibratory finishing machine for 511533 . The useful life of the machine is 10 years, at the end of which. the machine is estimated to have a rero salvage value. The machine generates net annual revenues of $9116. The annual operating and maintenance expenses are estimated to be $1271. If j\&M's minimum acceptable rate of return (MARR) is 0.13, how many years does it take before this machine becomes profitable