could you explain how you get that answer please?

Please answer the next question based on the closing July futures contract prices for GBP for four consecutive days in March 20XX. You bought two GBP futures contract at the closing price on 3/01. Each GBP futures contract requires the delivery of GBP 150,000. Suppose, the initial and maintenance margin for each contract are $2,000 and $1,500, respectively. Assume that you do not withdraw from your margin account during this period, but that you do meet your margin calls if you get any. Assuming that you meet your margin calls, if you get any, please estimate how much money you will have in your margin account at the close of the trading day on 3/04