i thought that it was possible and there must be a basic function
I have several products with a price per liter.
The packaging is in 20 l.
It is very important to encode the product with the base price per liter.
I would like the base price to be automatically multiplied by 20.
I try with a application rule but i showed directly as a discount.
I try to use a plugin variant price but I'm in confusion.
I think that it will be possible with a wonderfull component as virtuemart