You bought a house worth $324,000. You paid 25% of the purchase price in cash and arranged a twenty-five-year mortgage with a rate of 4.5% compounded semi-annually for the remaining balance. The mortgage has an amortization period of 25 years. After having made payments for 7 years (starting at the end of the first month), what will the outstanding balance of the mortgage be? The outstanding balance of the mortgage after 7 years will be $ ___(Round the final answer to two decimal places as needed. Keep all decimal places as you work through the problem.)