Currency
A Chinese man goes to the bank and asks to change a Chinese $50 note into Sterling, he is given £37.86.
A month later he goes to the bank and asks to change a Chinese $50 note into Sterling, he is given £41.23.
A month later he goes to the bank and asks to change a Chinese $50 note into Sterling, he is given £13.76.
HE is a little annoyed with this and asks the bank cashier why he was given £37.86 one month, the next month he is given £41.23, and the following month he is only given £13.76?
The cashier says
"Fluctuations"
The Chinese man says "well there's no need to be rude about it, Fluctu English too"