CAN SOMEBODY HELP WITH THE LAST QUESTION

A Calculate the Weighted Average cost of Capital \begin{tabular}{rrrr|r|r|} & Capital & Cost & Proportion & WACC \\ \cline { 2 - 5 } Long Term Liabilities & $1,989,032 & 7.77% & 0.0595 & 0.4600 \\ Preferred Stock & $1,229,856 & 10.09% & 0.0368 & 0.3700 \\ Common Stock & $9,198,832 & 15.02% & 0.2754 & 4.1400 \\ \hline Retained Earnings & $20,987,230 & 19.36% & 0.6283 & 12.1800 \\ \cline { 3 - 5 } & $33,404,950 & & 1.0000 & 0.1715 \\ \cline { 3 - 4 } 30 points \end{tabular} Calculate the unweighted average cost of capital 17.15%10 points Explain why there is a difference between the weighted and unweighted amounts 10 points