Bob makes his first $$600$ deposit into an IRA earning $8\mathrm{.}1\%$ compounded annually on his $24$ th birthday and his last $$600$ deposit on his $44$ th birthday $(21$ equal deposits in all$).$ With no additional deposits, the money in the IRA continues to earn $8\mathrm{.}1\%$ interest compounded annually until Bob retires on his $65$ th birthday. How much is in the IRA when Bob retires?