App mockup design for an e-commerce Grocery app.

Hi, The project is about designing an app mockup for a e-commerce grocery app. It's like any other marketplace model, where fruits, vegetables and grocery items will be listed. Also, a backend web dashboard mockup design will be required where the administrator will have the option to view various orders, day, week and month wise sales, and have option to dynamically update price of various commodities that are being sold through the grocery app. therefore, total there will be 4-5 designs that will be required to be made - login page, grocery items selection page, billing and check out page, and web dashboard for admin. Please provide samples of previous designs while placing the bid.