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A certain factory building has an old lighting system, and lighting the building costs, on average, $20000 a year. A lighting consultant tells the factory

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A certain factory building has an old lighting system, and lighting the building costs, on average, $20000 a year. A lighting consultant tells the factory supervisor that the lighting bill can be reduced to $8000 a year if $50000 were invested in relighting the building. If the new lighting system is installed, an incremental maintenance cost of $3000 per year must be taken into account. The new lighting system has zero salvage value at the end of its life. If the old lighting system also has zero salvage value, and the new lighting system is estimated to have a life of 20 years, what is the net annual benefit for this investment in new lighting? Take the MARR to be 12% New Lighting System Annual Equivalence Cost (AEC) = $ Annual savings from installing the new lighting system = $

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