A few years ago, Tesco’s, a large UK supermarket chain, put out a statement about its Christmas trading called ‘Tesco’s Christmas in numbers’.Part of the statement said:“Tesco will also sell around 3.5 million packs of carrots – that’s 27 million carrots! If these were to be placed in a line it would stretch 11 times around the world”.That’s impressive. However it is even more impressive if you analyse...