Buying and Selling Orders by piece control

The purpose is to have a inventory control per specific pieces of product. Since each of them measure different. So When they buy they add specific piece and when they sell it they choose the piece they are selling. Everything is track by warehouse. Here is what is needed: - Developed in PHP/AJAX with optional framework, but always need to be RESPONSIVE design to permit adaptable to any type of device (computer, ipad, cellphone (android and iphone)). - Each module must have a way to add, edit,delete and list info (using filter to query) 1. Warehouses 2. User control 3. Workers 4. Customers 5. Providers 6. Products 7. Buying Orders 8. Selling Orders 9. Transfer between warehouses ALL test and advance will need to be uploaded to our server for tests (NOT allow to test in your server) since we have the experience that we need to be sure it works with our server and not other things needed. NOT Optional that is the only way no other. Will need that after finish the project make a detailed instructions on how to install on the real server with step by step guide. Project will have separate milestone reserved for it, will not end project until having it. READ FULL SPECIFICATIONS ON ATTACHED FILE BEFORE BIDDING. OTHER WAY WILL CONSIDER YOUR BIDDING AS FILE BEEN READED.