Build me a react + firebase semi POS app

Need a simple point of sale web app with mobile responsive first approach.
Must be familiar with Firebase, React, Material-UI

Main Components
- Orders
- Products
- Customers
- Suppliers
- Employees
- Expenses
- Reports

Web App setup
- React js ( class based component )
- Material- UI (we will use the berry theme https://berrydashboard.io/)
- Responsive first approach
- Firebase as a backend
- Redux (if necessary to lift load off firebase)
- shopy backend as inspiration (mystore.myshopify.com ) see attached screenshots