A company is considering purchasing a machine that costs $$600000$ and is estimated to have no salvage value at the end of its $8-$year

useful life. If the machine is purchased, annual revenues are expected to be $$200000$ and annual operating expenses exclusive of

depreciation expense are expected to be $$4600.$ The straight$-$line method of depreciation would be used. The cash payback period on

the machine is

$4\mathrm{.}9$ years.

$3\mathrm{.}9$ years.

$2\mathrm{.}3$ years.

$8\mathrm{.}0$ years.