Hi, usually we sell most of our stuffs as in whole but right now there has been some of the retails going on around. And i want to make it sure that I have the stock for each of the products. For this i created two products with the same name and sell it on different prices on POS. What i want to do is every time I sell it in bundle like a package of 12 the quantity of the other product would be reduce. Say I have 3 cartons consisting of 12 bottles each, which means 36 bottles. So, if i sell 1 carton of 12 bottles there would be a reduction in another product with the same name. Which mean only 24 bottles left for the retails and vice versa.