I give an example.
With other management systems you can set the% margin on the purchase price:
For example, if the purchase price is 1 and the marginality of 30% is set, the sale price shown will be 1.30.
This is very useful for products that have a very rapid change in the purchase price, doing so when the purchase delivery note is loaded with the relative price, it automatically updates the sale price based on the% set, without calculating each time the new sale price