John owed James the sum of $300,000,$ due at the end of year $1,$ and $200,000,$ to due at the end of year $3.$ By mutual consent, the terms of payment were altered to allow John to discharge the debt by making a payment $400,000$ at the end of year $4,$ and a payment for the balance at the and of year $5.$ The interest rate of the loan was $15\%,$ what was the amount of the final payment?