On April 25th you have bought June Future on GBP on a price of 1.5445$, the contract size is 80,000. The initial margin is 5% for the next 3 days. The closing price of GBP are 1.5449$,1.5446$ and 1.5410$. Determine the marking to margin profit/loss for the above 03 days and the balance in the margin account