You purchased $100$ shares of IBM common stock on margin at $$31$ per share. Assume the initial margin is $50\%,$ and the maintenance margin is $30\%.$ Below what stock price level would you get a margin call? Assume the stock pays no dividend; ignore interest on margin. Answers must be entered with $2$ decimal places and no dollar signs, e$.$g$.6$ as $6\mathrm{.}00$;$32\mathrm{.}346$ as $32\mathrm{.}35.$