A loan with principal balance of $2,500 and structured as a Custom Amortizing style amortization having 6.00% fixed interest will cause the borrower to pay how much in interest on a pre-tax basis? The Amortization Structure for the 12 periods is 0.00%, 0.00%, 2.50%, 2.50%, 2.50%, 2.50%, 10.00%, 10.00%, 10.00%, 10.00%, 25.00%, 25.00%.