STEVE: This place serves good breakfasts, don't you think?
HOWARD: Yes. But I'm not used to eating American-style breakfast.
STEVE: What are you planning to do today?
HOWARD: I saw yesterday that they rent windsurfers at the beach. I want to rent one.
STEVE: Have you done windsurfing before?
HOWARD: No, but it looks fun. I always wanted to try it.
STEVE: Can you take a little advice from a friend?
HOWARD: Sure. What?
STEVE: Don't waste your money. Windsurfing is very hard. And it will be windy today.
They will charge you fifty dollars for a half-hour, and you won't be able to windsurf.
You will fall and fall and fall.
HOWARD: But I always wanted to try it. 
STEVE: Yes, but it takes a long time to learn.
You would spend a thousand dollars to learn it on a rental windsurfer.
HOWARD: Well, I will see. How was your day at the office?
STEVE: Hectic. It's always hectic. But how was your windsurfing?
HOWARD: I tried it for a half-hour.
It was interesting, but... well... I couldn't really do it.
STEVE: See? I told you. It's very hard.
HOWARD: I couldn't even stand on it and hold the sail. I probably fell down fifty times. 
STEVE: Fifty times?
HOWARD: Yes, it was really stupid.
STEVE: And how much did it cost to rent it?
HOWARD: It was fifty dollars for a half-hour.
STEVE: Well, that's not too bad then.
HOWARD: What do you mean? It's expensive!
STEVE: Yes, but you have to calculate a little.
You paid fifty dollars and you fell down fifty times.
So you only spent one dollar per fall. That's cheap.