I want to create a virtual store using solutions already available as Shopify or Iluria. Except that the service (deliveries) would not have a fixed pricing, the price would be based on the location of the sender and the recipient. To do this, I would like to use an external page that integrated with GMaps would calculate the price based on the route and transfer that price to the virtual store in order to direct the customer to the checkout and payment. Is it possible to do so using these solutions or just creating a store from scratch? Is it feasible to use this quote page with a payment company's API (Stone, Mundipagg, Paypal) to redirect directly to the checkout? In terms of feasibility, I also include security there.