A young Chinese lad was taking his first trip to the Western world.
Upon arriving in NYC, he made the typical exchange of currency to purchase things in America.
He was very well learned, and had little difficulty navigating through the city for his 10 days abroad. Upon returning to the airport customs area, he again went to the currency exchange booth to trade in his dollars for his native Yen.
When he calculated the exchange to be somewhat short, he inquired to the gentlemen in the booth. The simple response he received was a curt "fluctuations" from the man behind the window.
The chinese student walked a few feet away, turned back to the booth attendant, and yelled back:
"fluc you Americans, too!"