Buying paint from a hardware store:Customer: Hi, how much is your paint? Clerk: We have regular quality for $12 a gallon and premium for $18. How many gallons would you like? Customer: Five gallons of regular quality, please. Clerk: Great. That will be $60 plus tax. —————————————-Buying paint from an airline:Customer: Hi, How much is your paint? Clerk: Well, Sir that all depends. Customer: Depends on what? Clerk: Actually, a lot of things. Customer: How about giving me an average price? Clerk: Wow thats too hard a question. The lowest price is $9 a gallon, and we have 150 different prices up to $200 a gallon. Customer: Whats the difference in the paint? Clerk: Oh, there isnt any difference, its all the same paint. Customer: Well, then, Id like some of that $9 paint. Clerk: Well, First I need to ask you a few questions. When do you intend to use it? Customer: I want to paint tomorrow, on my day off. Clerk: Sir, the paint for tomorrow is $200 paint. Customer: What? When would I have to paint in order to get $9 paint? Clerk: That would be in three weeks, but you will also have to agree to start painting before Friday of that week and continue painting until at least Sunday. Customer: Youve got to be kidding! Clerk: Sir, we dont kid around here. Of course, Ill have to check to see if we have any of that paint available before I can sell it to you. Customer: What do you mean check to see if you can sell it to me? You have shelves full of that stuff; I can see it right there. Clerk: Just because you can see it doesnt mean that we have it. It may be the same paint, but we sell only a certain number of gallons on any given weekend. Oh, and by the way, the price just went up to $12. Customer: You mean the price went up while we were talking? Clerk: Yes sir. You see, we change prices and rules thousands of times a day, and since you haven