Read the dialogue and answer the question? P: It’s so cloudy. Will it be raining? S: The weather forecast says it’s cloudy with occasional showers. It looks like it’s going to be a big thunderstorm. P: Really? But I don’t have an umbrella with me. S: You could use an umbrella here for free. But you had to pay 30 Yuan as a deposit, which will be returned when you bring the umbrella back. P: That sounds a good idea. Question: How much should the passenger pay for using the umbrella?