You are long one CME Dec sterling future of contract size £62.500. Mon closing of the future was 1.8212 USD/GBP. On Tues, the price rose to 1.8289; on Wed the price changed to 1.8275. Calculate your profit/loss in USD on Tue and Wed.
Contract size= £ 62,500
The losses/gains on a futures contract (due to daily mark to market) are calculated for 2 days.