This app was mentioned in 3 comments, with an average of 1.00 upvote
Yes you can scan the barcode and then add the item’s price in the app Visual Grocery Shopping List. Let me explain how does it work.
To add a new grocery product:
• Please tap to the icon "plus" in top-left screen. There you can find items by keywords or click to barcode icon for searching by barcode.
• Click to the item in search results which you want to add to your shopping list.
• In the opened screen check product price and correct how much you want to buy.
• Click to “cart” icon to finish adding process.
Now in the app title you will see summary shopping list price. Also you can click to “$” icon to view price’s details.
If you click to any item in your list – this item will be marked as purchased. In “$” dialog you can find different information about purchased or gonna buy items price.
If you want to see any item’s price – please use long tap on it icon.
Check the Visual Grocery Shopping List – simple shopping list app or if you need also fridge organizer then Fridge and Shopping
It's not quite "material design" but it does have certain hallmarks. Web interface is available, but for view only.