Problem $3-15$ Short Position Margin

Assume an investor shorted $1,000$ shares of Company $Y$ at $$24\mathrm{.}50$ using a $50\%$ margin. Following a sharp rise in the stock to $$31\mathrm{.}85,$ the

investor has received a maintenance margin call. At this point, the investor is required to wire sufficient funds to bring account equity back to

$50\%.$ This information is summarized in the following table:

How much in additional funds must be added to the account to bring account equity back to $50\%?$

Additional funds in the amount of $$,$ must be added to the account. Round your answer to the nearest cent.