At one time the Canadian and US dollars were discounted by 10 cents on each side of the border i.e a Canadian dollar was worth 90 US cents in the US and a US dollar was worth 90 Canadian cents in Canada. A man walks into a bar on the US side of the border,orders 10 US cents worth of beer ,pays with a US dollar and receives a Canadian dollar in change.He then walks aross the border into Canada,orders 10 Canadian cents of beer,pays with a Canadian dollar and receives a US dollar in change.He continues this throughout the day, and ends up with the original dollar in his pocket.Who has paid for the drinks he has consumed?
