On the invoice for your ride, you will find the total rental price.
This is the number of hours x the hourly rate. It may be that you will be back a little later or perhaps boarding a little earlier, at that point we charge by 15 minutes. For example, are you 10 minutes later? Then you will be charged ¼ hour extra.
Are you returning the car earlier? Depending on the subscription, the ride will be shortened by up to two hours.