On January $15$th$,$ Sahar purchased $5,000$ shares of National Cement Co$.$ on a margin of $$160$ per share. On March $15$th the price of National Cement stock declined to $$140.$The initial margin and maintenance margin requirements were $60\%$ and $40\%$ respectively.

What is the actual market value $($AM$)$ on March $5$th$?$

$40\%$

$60\%$

$42\mathrm{.}86\%$

$54\mathrm{.}29\%$