I have often noticed that supermarkets will show price per Kg of products on the shelf. This helps the consumer make an informed choice regarding the size and pricing of a product. But, to confuse customers they will often show price per 100gms of the same product but maybe a different brand. I think this is a blatant example of deception designed to make customers, not that good with their sums, unable to make a comparison. Today, however, in Sainsbury's I saw a real hum-dinger! A box of 40 camomile tea bags was show with the price per 100gms. The same make of camomile tea bags in a