I'm building a webform application that allows visitors to plan and book an itinerary with multiple pickups and destinations in the same reservation.
A user can add up to 4 'transportations' and will receive an additional discount on each.
Looking at the wireframe below, where should I place the add/remove transportation control?
I would also like the customer to enter their email address (which will unlock an additional discount) and proceed to the next step to complete the reservation by pushing the 'book' button.
I have included a wireframe below. The problem is that I don't know where to place all the buttons and how to make it easy to understand.
You can also see how it works on www.simontaxi.com
Can you please let me know what you think would be the best practice for this kind of form? I don't think I have ever seen anything similar and I don't know if visitors will understand.