Fluctuation - the quality of being unsteady and subject to changes; "he kept a record of price fluctuations"

I was at my bank today; there was a short line.

There was just one lady in front of me, an Asian lady who was trying to exchange yen for dollars.

It was obvious she was a little irritated . . . She asked the teller, "Why it change?

Yesterday, I get two hunat dolla fo yen. Today I only get hunat eighty? Why it change?"

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

The Asian lady says, "Fluc you white peapal too"