If you, for example, receive price list from your supplier and want to add 20% margin to all net prices.

1. Enter a new price list
2. There is 1 price list row predefined.
3. Locate the Net line of that price list row and enter net prices in all periods.
4. Locate the Margin line, write 20 in the first cell and click CTRL+ENTER on keyboard to get 20% margin for all periods in that row.
5. Click OK to save changes.