Recently overheard at a money changing booth at Heathrow.

A Japanese businessman was changing 500,000 yen and when he received his currency and receipt he asked the cashier in broken english why the amount was different from his previuos trip when he changed the same amount.

The cashier just shrugged his shoulders and replied "fluctuations" after which the man then turned red and yelled "well f##k you caucasians too"!