These costs are calculated based on buying the unfinished potion premade. This allows you to skip putting clean dwarf weeds in a vial of water. However, this method is more expensive. The extra loss accumulated via this method is 2,036 per potion, however, the experience per hour is doubled.
The profit for making an unfinished dwarf weed potion using either a vial of water or filling your own vial is as follows.