Mary decides to buy a Treasury note futures contract for delivery of $100,000 face amount in September, at a price of 12020.0. At the same time, Eric decides to sell a Treasury note futures contract if he can get a price of 12020.0 or higher. The exchange, in turn, agrees to sell one Treasury note contract to Mary at 12020.0 and to buy one contract from Eric at 12020.0. If the price of the Treasury note decreases to 1202.0. Calculate Eric's balance on margin account. Assume that initial margin is $1,890.