Suppose you go to a department store to purchase some clothing. You have a coupon for 20 percent off the purchase you chose to make that day. After waiting in line for 15 minutes, you place your item on the counter with the coupon. First, the associate rings your item and quotes you the full price ($250), but then you point to the coupon, again.
The associate fiddles with the register, and finally after some number crunching, quotes you a price of $175 (30 percent off, instead of the posted 20 percent off). You notice the math error.
Do you tell the employee that she made a mistake in applying the discount?
Please vote early, and tell your friends to vote. The poll is on the sidebar (----->). Also, here's a question for discussion in the comments: How should an employee be disciplined (if at all) for making such a mistake? And, what about a customer who doesn't speak up? Is the customer always right, even if the math isn't?