A schedule of level payments for a 10 year amortizing loan of $800,000 has an interest rate of 6% quarterly. After two years have gone by (during which the borrower has made all the agreed upon quarterly payments) interest rates have steadily changed, so that the market IRR for loans to this borrower would be 4% quarterly. What is the diference between the market value of the remaining pay- ments, and the book value of the outstanding balance, immediately after the 8th coupon is paid?