Create/Develope a website to check best single item's price and total shopping list price on several local supermarkets

We need to develop a website where users can create shopping lists and compare both individual prices as the total purchase price in several local supermarkets. Unregistered users can: 1) Users can find the best price on a single product, in every supermarket. 2) Create shopping lists, but to verify prices or save the lists, users must register. Registered users can: 1) Users can find the best price on a single product, in every supermarket. 2) Users can save their shopping lists, to check prices again at any time. 3) Users can compare the total purchase price (shopping lists) in several supermarkets. Specifications: 1) The shopping lists are created by entering the product name and then selecting from an autocomplete list. The suggestions list should show product name, package presentation (Kg., Liters, etc.) and a reference image. 2) Users must verify their accounts via email. 3) Users can be shared via facebook or twitter prices via sharer urls. 4) If the user is using a smartphone, they can check the best price for a product using barcode scanner (uploading a photo). [THIS OPTION IS NOT NECESSARY, BUT YOU CAN MAKE IT WOULD BE THE BEST]. 5) The site must be responsive. Requirements: 1) Design database. 2) Design website. 3) Development. Details: Product's Database: a) Product name. b) Barcode EAN-13 (13 digits number) c) Product description. d) Package presentation. e) Reference image URL. All supermarket price is checked via API: System requests each EAN CODE: [login to view URL] API RESPONSE JSON (EXAMPLE EAN=1365489713654): { "product_name": "PRODUCT NAME", "ean": {1365489713654}, "price": { "supermarket_1": 10.00, "supermarket_2": 10.87, "supermarket_3": 9.96, "supermarket_4": 11.02 } }