A firm has only two funding sources, debt and equity. Their percentage of debt is $21\%,$ their tax rate is $20\mathrm{.}6\%,$ and their pretax cost of debt is $4\mathrm{.}23\%.$ If the required return on their equity is $10\mathrm{.}6\%,$ then what is their weighted average cost of capital? State your answer as a percentage with two decimal places $($i$.$e$.,13\mathrm{.}21,$ not $\mathrm{.}1321).$