In France, before the Euro, things would be priced at 99 centimes, but the smallest coin was a 3 centime coin (worth about half a cent). This meant that when p

In France, before the Euro, things would be priced at 99 centimes, but the smallest coin was a 3 centime coin (worth about half a cent). This meant that when paying cash, some form of rounding was often necessary to give the correct change, but the rounding (in my (childhood) experience) would always favour the customer. I'm amazed that shops in the US can get away with rounding up.