A Japanese tourist went into an American bank to exchange some Yen for Dollars..

He handed the teller 10,000 Yen and the teller returned him $90.

Confused, the Japanese man said "last month I exchanged 10,000 yen and received $100. Why today only $90?"

The teller replied "Fluctuations"

"Oh yeah? Fluck you Yankees too!" retorted the Japanese man