You can find the total price of a product batch based on the amount and the price of each product in the bundle (purchase price and sale price).
How to add a batch to the product or service list?
Go to "Stocks" in the main Menu on the Dashboard
Click on "Products or Services"
Then click on "Add product or service" on the top left
Check the "Batch" box
Making a batch will let you put several of your products or services together in your invoices, quotes, and offers.
(Enable this option in the general settings of "Invoicing": "Pre-fill the comment of a product when adding to a quote/invoice")