To save for her newborn son's college education, Lea plans to invest $$3600$ per year into her mutual fund $($assume that Lea will make her first deposit into the account today, and she will make a total of $18$ deposits$).$ If Lea earns $10\mathrm{.}5\%$ p$.$a$.$ on her account, how much will she have in the account exactly $18$ years from today?