Hello there, coolproza.
When entering the values of your products from the item lists, we can edit them to track their total price values. You may refer to these steps:
If you want to add a markup percentage to the product's selling price, I'd recommend searching for a third-party application. Then, we can have them integrated since this is currently an unavailable feature in the online version.
Moreover, you can check out this article to guide you on what specific reports you'll need to track the status of your inventories: Use reports to see your sales and stocks status.
You can always add a reply below if you have additional questions about managing sales items in QBO. We'll gladly help you out. Keep safe!
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