If sales $=$ $$500,000,$ turnover $=1\mathrm{.}5,$ and net income $=$ $$75,000,$ then Blank$\_\_\_\_\_\_.$

Multiple choice question.

ROI $=22\mathrm{.}5\%$ and margin $=15\%$

ROI $=20\%$ and margin $=20\%$

ROI $=7\mathrm{.}5\%$ and margin $=25\%$

ROI $=15\%$ and margin $=15\%$