Concord, Inc. is considering the purchase of a new machine for $480000 that has an estimated useful life of 5 years and

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Concord, Inc. is considering the purchase of a new machine for
$480000 that has an estimated useful life of 5 years and no
salvage value. The machine will generate net annual cash flows of
$84000. It is believed that the new machine will reduce downtime
because of its reliability. Assume the discount rate is 8%. In
order to make the project acceptable, the increase in cash flows
per year resulting from reduced downtime must be at least