What is Pure Michigan's Cost of Capital $($WACC$)?$

Their marginal tax rate $=30\mathrm{.}0\%$

Formulas:

$"g"=$ ROE $x(1-$ Payout$)$

$D_1=D_0(1+g)$

WACC$=W_{D}x{r}_{D}x(1-t)+W_s{r}_s$