With what I seen last week Take small U.S. bills (5's 10's and 20's) and you will get most prices in U.S. try to pay exact amount in U.S. Exchange big bills for J's carry both ask both prices pay in the money that is best for you. I say if its U.S. pay in U.S. Price in J's pay in J's. I use to be the type who exchanged all my U.S. for J's but after the last trip more small U.S. better.