Barbara buys $150$ shares of DEM at $$34\mathrm{.}00$ a share and $160$ shares of GOP at $$41\mathrm{.}00$ a share. She buys on margin and the broker charges interest of $14$ percent on the loan. 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.

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