I was at a restaurant the other day which had an interesting feature: the two menus they gave us listed different prices for the same items. One menu quoted $12 per margarita and the other offered the exact same drink for $11.
For a split second I wondered whether the restaurant was carrying out some sort of pricing field experiment. I’m pretty sure, though, that wasn’t the case. Just regular old incompetence, I suspect.
I wouldn’t usually pay $11 or $12 for a margarita, but I was so curious in this circumstance that I went ahead and ordered one. (Well, actually, I ordered three by the time I was done.)
What was the true price? Strangely, it turned out not to be $12, or even $11. They charged me exactly $7.94 per drink.
Luckily, I didn’t know that in advance or I might have had a fourth margarita, which definitely would have been a bad idea.