Today i was in the bank

There was just one lady in front of me, an Asian lady who was trying to exchange yuan for dollars. It was obvious she was a little irritated. She asked the teller, "Why it change? Yesterday, I get two hundred dollar for yuan. Today I only get hundred eighty? Why it change?" The teller shrugged his shoulders and said, "Fluctuations. The Asian lady says, "Fluck you white people too!"