Calculate the monthly payment. You want to buy a house that costs $250,000, you have $25,000 for a down payment, loan rate interest is 3.5% a year compounded monthly and you plan to get a 25 year loan with a balloon payment of $30,000. Insurance costs $450/year and property taxes are 8% a year of the assessed value of the house. The assessed value is $120,000.The answer is $2026.59. I don't know how to reach this solution.