Guy #1 goes into Brand X Drug Store to get a battery, and from behind sales counter a girl (about 20) says: "Can I help you?"
Guy #1 says: "I need a new battery like this," (and hands her a small battery)
Girl #1 starts looking for battery numbers on boxes, and finally picks out a battery about the size of a watch and tries to verify number on actual battery.
Guy #1, notices she is looking intently at battery the size of a watch and says: "I don't think that's the one."
Meanwhile another customer comes up and needs to buy some things, and she excuses herself to help the second guy.
Guy #2 says: "These things are on sale, aren't they?"
Girl #1 says: "Yes," and rings them up, and then says: "You know, we had a really good sale on gum last week, and I bought a lot of gum, a WHOLE LOT of gum! And you know when I got home, I realized that I don't even like gum. I don't know what I'm going to do with ALL that gum, and I bought a L O T of gum."
Guy #1 is still standing, waiting, and walks back up to counter as she continues to say "a whole lot of gum" and she looks up at Guy #1 and says: "Can I help you?"
Guy #1, dismayed that she doesn't remember him, says: "Yeah, you know that battery in your hand? That’s mine!"
Girl #1: "Oh yeah….I'm not very good at picking out batteries…You should try
Brand Z Drug Store... They have a lot more batteries."
Guy #1 goes to Brand Z Drug Store.
Girl #2 (standing about 5 feet away) says: "Can I help you?"
Guy #1 sets his battery on the counter.
Girl #2, without looking at battery, says: "How many do you want?"
Guy #1: "Three."
Girl #2 turns around, gets 3 batteries from a drawer, and says: "That will be $9.21."
Guy #1: "How did you know the battery number?"
Girl #2 smiles and says: "I have been doing this for 30 years."