Margin is nothing but profit. For example, let’s say that you own a kirana store called PG Kirana. You pay 10 rs for a Colgate toothpaste, and sell it at MRP – 12 rs. In this case:
Your Cost price = 10 rs
Selling Price = 12 rs
Profit (aka margin) = 2 rs. OR 2/10 = 20%.