\[ {WACC = {\text{ }}\left( {wd} \right)\left\[ {kd\left( {1 - t} \right)} \right\] + \left( {wps} \right)\left( {kps} \right) + \left( {wcc} \right)\left( {Kcc} \right)} \]
\[ {After{\text{ }}tax{\text{ }}cost{\text{ }}of{\text{ }}debt = {\text{ }}kd\left( {1 - t} \right)} \]
Where: