Try this site where you can compare quotes from different companies: WWW.ANNUITY-HELP.US Can someone answer this math question? Can someone answer this question on annuity? Formula: S = PMT [(1 + r)^n - 1)] / r its annuity! Question: Sarah will be retiring in 15 years. With her children grown and finished with college, he can save money toward his retirement. He decides to deposit $800 per month into a mutual fund that is earning 6.72%, compounded monthly. How much will Sarah have in the account when she retires? Also, wouldn't you have to divide 6.72(.0672) by 12?