Estate has sales revenue of $$490,000$ resulting in net operating income of $$43,610.$ The residual income is $$17,150,$ and the investment turnover is $2.$ What is the hurdle rate?

Multiple Choice

$17\mathrm{.}80\%$

$8\mathrm{.}90\%$

$10\mathrm{.}80\%$

$21\mathrm{.}60\%$