This whole argument is based on the fact that the cost of Bud is better value ot one supermarket as opposed to another. This raises a couple of other interesting points:
A) Bud is such god awful weasel wee that it should be given away anyway.
B) Supermarkets are the worst thing that has happened to our society in many a generation. They sell you what they want to sell you at the price they dictate and force all our locally run shops out of business so they can pay dividends to thier shareholders, most of who don't even live in the UK. This is clearly proven by the fact that they can sell such rubbish as Bud beer at any cost.
So forget buying American tasteless chemicals and supporting fat cat international investors and buy beer from your local brewery and help to support local business and enjoy drinking a beer with a degree of taste!