Problem $5-19$ Future Value of Multiple Annuities $($LG$5-2)$

Assume that you contribute $$270$ per month to a retirement plan for $15$ years. Then you are able to increase the contribution to $$540$ per month for another $25$ years. Given a $6\mathrm{.}0$ percent interest rate, what is the value of your retirement plan after the $40$ years? $($Do not round intermediate calculations and round your final answer to $2$ decimal places.$)$

Future value of multiple annuities