Build a Online ordering for wholesale foods

We are needing assistance with the website / technology portion of our business. As of right now, they are getting in pages of orders which make it harder for customers to delegate time looking through pages of product. making it easier to order and access supplies. It also would bring an option for customers to pay directly online. The pricing will be controlled with a user login from the back end. We need to add a regional pricing option, as they are many customers in different groups. For example, Region 1 could be “A” with higher prices… Region 2 could be “B” with lower prices. Once a customer views/ adds the product to their cart, they will have a time frame (2hours) before the prices could be changed. We will also incorporate variable product specific markup due to external factors (transportation, farmers, availability etc.) This could be applied to things such as vegetables, poultry, fish, meat etc.