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What is the equivalent annual operating cost of a heat exchanger that costs 31159 dollars and consumes 20452 dollars of utility per year? The applicable

What is the equivalent annual operating cost of a heat exchanger that costs 31159 dollars and consumes 20452 dollars of utility per year? The applicable Marshall-Swift index for today is 1751 and the one from which the heat exchanger was initially costed was 1042. Assume that the heat exchanger is used for 11 years at a 6% value to your company.

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