Answer:
By the the new machine would incur $6.620 more in costs.
The decision appropriate would be to stick to using the current machine
Explanation:
  Incremental analysis for new and old machines
                           Old Machine New Machine    Difference
Purchase cost                    -             $25,080    ($25,080)
Annual operating costs:
($24,950*5)($19,560*5) Â Â Â Â Â Â Â Â Â $124,750 Â Â Â Â Â Â Â Â $97,800 Â Â Â Â Â $26,950
Salvage value                  ($8,490)            -          ($8490)
total costs                      $116,260        $122,880     ($6,620)
By buying the new machine,Johnson Enterprises would incur $6,620 more in costs,which implies that sticking to the current machine is preferable from an incremental benefit analysis point of view.
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