Bob makes his first $$900$ deposit into an IRA earning $7\mathrm{.}8\%$ compounded annually on his $2424$th birthday and his last $$900$ deposit on his $41$stst birthday $(18$ equal deposits in$$ all$).$ With no additional$$ deposits, the money in the IRA continues to earn $7\mathrm{.}8\%$ interest compounded annually until Bob retires on his $65$th birthday. How much is in the IRA when Bob$$ retire