A machine shop recommends that dielectric fluid should be replaced in the EDM process after 500 hours

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A machine shop recommends that dielectric fluid should be replaced in the EDM process after 500 hours but the user's manual suggests changing the fluid every 700 hours. If a mechanic runs a machine 3,000 hours in a year and replaces the fluid after every 800 hours, the fluid costs $0.8. How much money in percent will the mechanic save per year?
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Engineering Economy

ISBN: 978-0132554909

15th edition

Authors: William G. Sullivan, Elin M. Wicks, C. Patrick Koelling

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