Dan has been a data collector for 10 years. You know when they say how much it costs to live somewhere? He's the guy who has to find out. He goes around the world and walks around supermarkets recording the prices of apples/cheese/you name it into his Dictaphone. He's been to almost every supermarket, in every country, in the world. This is the story of how. From the man who brought you How I Came Third in the North Korean Marathon.