Jan Green established a savings account for her son's college education by making annual deposits of $6,000 at the beginning of each of 6 years to a savings account paying 12%. At the end of the 6 year, the account balance was transferred to a bank paying 15%, and annual deposits of $6,000 were made at the end of each year from the 7 through the 10 years.

What was the account balance at the end of the 10 year?