Hello this is what I would like to achieve:
1. I want the client to select a service. Either 4 hours or 8 hours. (Rental of a car)
2. I want the client to select the time of the services, in increments of 30 mins. However, if a cliente selected 8:30, then in their confirmation i would like for it to calculat to 4 hours from 8:30
is this possible!?