You discover all kinds of interesting things if you go to the grocery store without a list and just poke around. I began my visit by picking up a wedge of parmesan cheese in the cooler by the deli counter. Later I found myself in the back of the store with the low-rent cheese and what did I find but the apparently identical product.
Except they had different bar code numbers, and the one in the front of the store was $1.80 more expensive!
Guess which one I put back and which one I bought.