I want to add a field to each product in the admin area. The field should not be visible to the customer and should be extractable from the database, together with all other product fields. I'm using Easy Populate to extract the entire stock, and it would be preferable if this column was included in the CSV file created.

The field should, when inserted, reflect the purchase price of the product and has no actual connection to the sale (net or gross) price. I've reviewed the products_profit_margin_calculator_report_v1.2 add on, but it calculates the sale price based on the purchase price of the product. My two figures should be separate.

The aim of this is to easily be able to calculate the sale profit of the product.

Is there such contribution and what's it called?