The answer for #8 was $532.24, I just need help with number 9, I keep getting different answers.

8. Mr. Wise is retiring in 25 years. He would like to accumulate $1,000,000 for his retirement fund by then. He plans make equal monthly payments to achieve his goal. If the rate of return on the retirement fund is 12% (APR), what will his monthly payments be? Mr. Wise makes payments (as per problem 8) for the first ten years and stops making payments afterwards due personal problems. How much would he have accumulated at the time of retirement assuming that the accumulated amount keeps on earning interest at the stated rate on a monthly basis? 9