Han Zolo's bank guarantees him a return rate of $9\mathrm{.}10\%$ in year $2031,9\mathrm{.}30\%$ in year $2032,3\mathrm{.}30\%$ in year $2033$ and $7\mathrm{.}40\%$ in year $2034.$ If he deposits $$8,000$ at the end of year $2031$ and $$20,000$ at the end of year $2032,$ how much will he have in his savings account at the beginning of year $2034?$$$31,889\mathrm{.}80$$$30,355\mathrm{.}54$$$29,692\mathrm{.}55$$$31,399\mathrm{.}70$O $$26,723\mathrm{.}30$