Margaret Lindley paid $15,040 of interest on her $300,400 acquisition debt for her home (fair market value of $500,400), $4,040 of interest on her $30,040 home-equity loan, $1,040 of credit card interest, and $3,040 of margin interest for the purchase of stock. Assume that Margaret Lindley has $10,040 of interest income this year and no investment expenses. How much of the interest expense may she deduct this year