Warner is considering buying a new machine costing $$20,000$ that is expected to generate cost savings of $$9,000$ for each of the first $2$ years and $$1,500$ in each of the last $2$ years. There is no salvage value.

What is the approximate accounting rate of return on the new machine?

$-23\mathrm{.}7\%$

$1\mathrm{.}3\%$

$2\mathrm{.}5\%$

$45\mathrm{.}0\%$