You stayed up late last night and only got a few hours of sleep. You are riding the elevator at the end of the day with a coworker who you are good friends with. You say this, complaining to him about how tired you are.
You're going to go to a concert with your friend. Your friend bought the tickets, and now he's giving them to you. You want to know how much they cost, so that you can pay him back. This is what you ask him.