18.3.

Currency exchange rates. On the day you arrive in England, the exchange rate for U.S. dollars and British pounds is $1:0.52. You have $4,200, which you convert to pounds. While you remain in England for the next two weeks, the exchange rate falls to $1:0.48. As you leave England, you convert the 138 you have left to dollars. How much did you spend in England in U.S. dollars? Did the movement in the exchange rate help or hurt you? How much did you spend in England in U.S. dollars? (Round to the nearest cent.)