According to March 1, the spot exchange rate of the euro is EUR/USD = 1.3432, and it can be concluded that the customer spent USD 500 *1.3432 = 671.6 million to buy the euro.
On June 1 day, the euro was sold immediately. At this time, the spot exchange rate of Euro is Euro/USD = 1.2 120, so it is converted into 500,000 Euro, 50 *1.212 = 606,000 USD.
The final spot market profit and loss was-$6.56.
forward market
On March 1 day, the futures market sold four lots of euro futures contracts due in June, and the transaction price was EUR/USD = 1.3450, so the contracts that could be sold were equivalent to getting back 50 * 1.345 = 672500 USD.
On June 1 day, I bought four lots of euro futures contracts due in June, and the transaction price was EUR/USD =1.21,so I bought back EUR 67.25/1.21kloc.
In other words, in the futures market, investors got 55,000 euros, which was converted into 5.5 *1.212 = 66,600 dollars.
The breakeven of the two markets is equal to: 0.10.06 million USD.