What is the parking fee?

The charging standards are as follows:

Small and medium-sized vehicles charge 1 yuan every half hour, the maximum charge for parking for 24 hours is 20 yuan, and the maximum charge for night is 5 yuan. The charging standard of large vehicles is twice that of small and medium-sized vehicles. Parking fees for more than 24 hours in each area are different, such as Wenzhou underground parking lot, which charges free parking for the first 30 minutes; 5 yuan is charged for each train from 30 minutes to 60 minutes; After one hour, 5 yuan will be charged per hour.