Over the life of the loan, interest makes up 57% of the total cost, which is $431,017.82.
Your loan amount is $320,000.00. At 6.8% annual interest, the lender receives $431,017.82 in interest on top of that principal.
Consider making extra principal payments each month to reduce total interest and shorten your loan term significantly.
Next stepCompare your interest rate with current market averages and consider refinancing if rates have dropped more than 0.75% below your current rate.