Question $47(30$ points$)$

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Shi Import$-$Export's balance sheet shows $$300$ million in debt, $$50$ million in preferred stock, and $$250$ million in total common equity. Shi's tax rate is $25\%,$ rd $=6\%,rps=5\mathrm{.}8\%,$ and $rs=12\%.$ If Shi has a target capital structure of $20\%$ debt, $5\%$ preferred stock, and $75\%$ common stock, what is its WACC?

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