From this page, you can set your profit margin that will be added to product cost
How can you do it?
it's easy! First, you need to login to your account in Knawat.com
1. From Knawat home page, Click on Dashboard button
2. From the menu on the left, Click on Pricing Rules
3. In the first field, set the margin that will be used in sale price calculation equation
4. The second field is optional. If you want to display two prices for each product on your website (Before and After Discount) you can set the margin in this field
Note that margin of the second field should be bigger than the margin in the first field