You need the spot rate and the forward rate to answer these questions. Did they give them to you?
As of now, 1/31/14, 6:01 am, the spot rate is £1 = $1.65....
£600,000 * $1.65 = $990,000....so today's actual exchange rate doesn't give you any of the answer options.
If the forward rate today is the same as the spot rate in 60 days time, and the customer waits 60 days for payment of 600,000 there is no loss at all !
Please explain how to do this. I am completely lost.