We are a printing company. We print on paper, it can be single side or double side. The item is the same paper but price varies from single side or doubleside. Currently we can't track stock, as we have to give 2different items but actually its the same item. We can't also use priceless as in one bill there could be 2 single side and 4 double side items. If we give price list all of it gets changed. We want a solution where we can club multiple items into a single inventory source.