An investor has just entered 2 short copper futures contracts at a futures price of 3.9 cents per pound. The size of each contract is 25,000 pounds. The initial margin is $5,000 per contract and the maintenance margin is $3,500 per contract. A month after opening the position, the futures price rises to 4.3 cents per pound. What is the balance of the total margin account at the end of the month? (Assume no margin call has occurred over this period, and your answer should be to the nearest dollar without the dollar sign.)