A firm has determined its target capital structure and it after$-$tax cost for each source of capital. What is the firm's weighted average cost of capital $($WACC$)?($Enter your answers as a percentge rounded to $2$ decimal places$)$

$\backslash$table$[[$Source of Capital,Proportion,Cost$],[$Long$-$term Debt $($after taxes$),30\%,6\%$