products_cost, products_markup, products_margin_gross_dollar, products_margin_gross_percent
Thnx, currently I am using products_purchase_price and products_margin (and thus so is quick_updates). In which products_margin is the profit percentage.

Now I assume products_margin_gross_dollar is the absolute profit (still not happy about the _dollar extension though ;-) ). But I am not sure about products_markup? Can you explain what that adds to it?

Anyway, I am willing to convert the existing products_purchase_price and products_margin, so that these are defined i.s.o. hardcoded.