Company X and Company Y enter into an interest rate swap contract to swap fixed for floating interest rates for a notional amount of $500,000. The term of the interest rate swap is two years and the interest payments will be swapped every six months. The fixed rate on the swap is 4.75%, while the floating rates on the swap are as follows: 6-Month LIBOR Now 4.50% 6-months from now 4.70% 12-months from now 4.90% 18-months from now 5.10% What is the net payment that will be exchanged by the two counterparties in 18 months?