Barbara buys $140$ shares of DEM at $$29\mathrm{.}00$ a share and $170$ shares of GOP at $$37\mathrm{.}00$ a share. She buys on margin and the broker charges interest of $7$ percent on the loan.

If the margin requirement is $62$ percent, what is the maximum amount she can borrow? Round your answer to the nearest cent.

$

If she buys the stocks using the borrowed money and holds the securities for a year, how much interest must she pay? Round your answer to the nearest cent.

$

If after a year she sells DEM for $$22\mathrm{.}00$ a share and GOP for $$26\mathrm{.}00$ a share, how much did she lose on her investment? Use a minus sign to enter the amount as a negative value. Round your answer to the nearest cent.

$

What is the percentage loss on the funds she invested if the interest payment is included in the calculation? Use a minus sign to enter the amount as a negative value. Round your answer to two decimal places.

$\%$