$16$ A series of monthly cash flows is deposited into an account that earns $12\%$ nominal interest compounded monthly. Each monthly deposit is equal to $$2100.$ The first monthly deposit occurred on June $1,2008$ and the last monthly deposit will be on January $1,2015.$ The account $($the series of monthly deposits, $12\%$ nominal interest, and monthly compounding$)$ also has equivalent quarterly withdrawals from it$.$ The first quarterly withdrawal is equal to $$5000$ and occurred on October $1,2008.$ The last $$5000$ withdrawal will occur on January $1,2015.$ How much remains in the account after the last withdrawal?