"WHY IT IS IMPORTANT TO UNDERSTAND ENGLISH!" joke

I had a bunch of Canadian dollars I needed to exchange, so I went
to the currency exchange window at the local bank

Short line. Just one guy in front of me...an Asian guy who was trying
to exchange yen for dollars and he was a little irritated.

He asked the teller, "Why it change?? Yestoday, I get two hunat dolla
for yen. Today I get hunat eighty?? Why it change?"

The teller shrugged his shoulders and said, "Fluctuations".

The Asian guy says, "Fluc you white people too!"