You are running a small machine shop where you need to replace a worn-out sanding machine. Two different models have been proposed:• Model A is semiautomated, requires an initial investment of $150,000, and has an annual operating cost of $55,000 for each of three years, at which time it will have to be replaced. The expected salvage value of the machine is just $15,000.• Model B is an automated machine with a five-year life and requires an initial investment of $230,000 with an estimated salvage value of $35,000. Expected annual operating and maintenance cost of the B machine is $30,000. Suppose that the current mode of operation is expected to continue for an indefinite period. You also think that these two models will be available in the future without significant changes in price and operating costs. At MARR = 15%, which model should you select? Apply the annual-equivalence approach to select the most economical machine.
You are running a small machine shop where you need to replace a worn-out sanding machine. Two different models have been proposed:
• Model A is semiautomated, requires an initial investment of $150,000, and has an annual operating cost of $55,000 for each of three years, at which time it will have to be replaced. The expected salvage value of the machine is just $15,000.
• Model B is an automated machine with a five-year life and requires an initial investment of $230,000 with an estimated salvage value of $35,000. Expected annual operating and maintenance cost of the B machine is $30,000. Suppose that the current mode of operation is expected to continue for an indefinite period. You also think that these two models will be available in the future without significant changes in price and operating costs. At MARR = 15%, which model should you select? Apply the annual-equivalence approach to select the most economical machine.
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