7. A trader takes a short position of 5 contracts in the FTSE futures contract at the close of trade. One contract is for 10 times the index. The futures contract has a maintenance margin of 1000 and initial market of 1500 per contract. The index futures price increases from 1175 to 1185 over the course of the first trading day (close to close). What is the balance in the trader's margin account at the end of the first day?