Well, technically it's not, because I already know the answer. You must admit, however, that it is a great word...
Imagine this scene:
A person goes to a shop with the intention of making a purchase. This person discovers that a very high quality variety of the product that they were wishing to purchase is on sale, therefore allowing them to purchase this high quality item rather than a lower quality one at the same price. This makes the person very happy, and causes them to exclaim "Excellent! I shall take two!" The person takes note of the little red price tag on the display item, which we shall call Price A. The person takes their intended purchases to the counter.
Once at the counter, as the sales assistant is peeling off the bar code stickers, the person makes note that one of the stickers displays Price A, and the other displays a price a little higher than Price A, which we will refer to as Price B. The person doesn't let this bother her, as she is quite well aware that trade practices allow that the product must be sold at the displayed price (I'm sure there are extenuating circumstances here, but I would imagine that they are generally for extreme cases).
So, imagine this person's surprise when the total cost issued to her is twice that of Price B! Remember, one of the items was barcoded at Price A, which was also the price on the display item. Technically, the shop assistant could have been in the right had she rung up one product at Price A and one at Price B, as this was the price shown on the items themselves. Then she could have been gently reminded that the goods must be charged at the display price (and isn't there something inherently wrong with charging different prices for identical items?). No, she deliberately chose to scan both products on the Price B barcode, therefore charging more that the ticketed price for one of the items, which the author hesitates to suggest is ILLEGAL, YOU STUPID WITCH!
When this was pointed out (far more politely that strictly necessary, by the way) one of the items (count it, just one) was
reluctantly recharged at Price A as shown on it's bar code. Okay, so now the situation has wandered back from the precipice of illegal transaction, but still not right. There's still that pesky display price (Price A) and the fact that one can't charge different prices for identical products in the same transaction. It wasn't until the display item, with it's little red sticker with Price A on it, was fetched and shown to the World's Stupidest Shop Assistant, that she relented (with much grumbling about how people should check these things, and how she was going to get into trouble - LIKE I CARE! - and boy, how much trouble do you think you are going to be in if I write a letter of complaint about your very nearly unlawful transaction?) and chaged both products at the displayed ticket price, and to the purchaser's, by now very small, satisfaction.
All this happened at David Jones. At the Royal Doulton counter. You'd think they'd know better.
Next time I'm going to Peter's of Kensington.