The former prime minister of Britain, David Cameron, was shamed when he mistakenly guessed that a value loaf of bread at the supermarket would cost "well north of a pound" (around $1.40).
When he was informed that a discount loaf of bread costs about $.60, he proclaimed that he doesn't buy discount bread because he prefers to make his own at home, using his Panasonic bread maker (which costs about $200 on average — and that's not to mention the ingredients for the bread).