what is the monthly mortgage payment for this question?

Your have just sold your house for $1,000,000 in cash. Your mortgage was originally a 30-year mortgage with monthly payments and an initial balance of $300,000. The mortgage is currently exactly 18.50 years old, and you have just made a payment. If the interest rate on the mortgage is 5.25% (APR), how much cash wil you have from the sale once you pay off the mortgage? (Ignore any real estate transaction costs.) The discount rate is 0,43750% per month. (Round to five decimal places.) The monthly mortgage payment is $ (Round to the nearest cent.)