A hotel room

Hotel clerk: Good morning. May I help you?
Rob: Yes, I need a room for three nights.
Hotel clerk: Certainly. We have standard and deluxe rooms.
Rob: What's the difference?
Hotel clerk: Standard rooms are smaller than deluxe rooms. The beds in the deluxe rooms are bigger.
Rob: I guess the deluxe rooms are more expensive than the standard rooms.
Hotel clerk: Yes, of course.
Rob: The standard is fine for me. I don't have much money, so give me the cheapest room you have.