You bought a house 2 years ago. To finance the purchase, you took out a mortgage for $800,000. The interest rate on the mortgage is 7.8% and the amortization period is 20 years. You chose to make 12 payments per year and each payment is $6,531.21. Your last payment was yesterday. How much principal remains owing today? The principal that remains owing today is $ (Round to the nearest cent as needed.)