Calculate additional monthly payment required to pay off balance in 7 years. \begin{tabular}{|l|l|c|c|c|c|c|} \hline 11 & & & & & \\ \hline 12 & & & & & \\ \hline 13 & & Minimum & Total & & \\ Month & Payment & Payment & Interest & Principal & Balance \\ \hline \end{tabular}