Sandy's parents would like to have an annuity pay her $600 at the beginning of every month from September 1, 2012, to April 1, 2017, to help with her university tuition and living expenses. On May 1, 2017, they would like to give her a graduation gift of $6,000. If the annuity can earn 6.15% compounded monthly, how much money must be in the account on September 1, 2012?