We would like to store the quantity of individual items that a particular product is supplied in .
For example. If we sell a unit of 1 but buy in a box of 6 then we would like to store this information with the product and supplier information so that we can only order this product in a multiple of the box size.
IE - we would only be able to order 6, 12, 18, 24 .... units of this item from the supplier since it is sold in a box of 6.