I'm selling services and the page should work on a simple principle - the customer enters their demand (service criteria), and based on this criteria I offer a price.
I would like the customer pay online a sort of a service booking fee (a percentage of the total price).
How can I make this happen? Each offer I make is for a different price and so far I have seen only payment apps where each product I want to sell needs to have a fixed price specified. However, my prices will always differ based on the customer's demand.
As an easy example I would give is a transportation service - customer would specify number of persons to be transported, origin, destination, date and based on this I would offer the price. After he accepts the offer, I want him to pay online an upfront fee let's say 30% of the total price.
I can easily get to the point where the customer accepted the offer, but now I don't know how to process the payment.
Is there any payment app that does not need a fixed price of a selected product to be entered but rather takes the price from some existing field on a page or in a database?
Thanks a lot for your ideas!