Minden Co$.$ is considering buying new computer software that will assist customers in their product choices. The cost is $$50,000.$ The benefit will be an additional cash inflow of $$25,000$ for four years, at which point the software will need replacing with a more modern version. The return on initial investment is $\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_.$

Question $23$ options:

$25\mathrm{.}0\%$

$15\mathrm{.}0\%$

none of the options

$12\mathrm{.}5\%$

$10\mathrm{.}0\%$