You bot $1000 stocks on margin using $700 of your own cash and $300 borrowed from your broker. The maintenance margin requirement of 30%. What's the market value of your stocks just before triggering a margin call? \begin{tabular}{l} \hline 418.57 \\ \hline 428.57 \\ \hline 500 \\ \hline 408.57 \\ \hline 468.57 \\ \hline 448.57 \\ \hline 438.57 \\ \hline 458.57 \end{tabular}