Sales BOM: A Sales BOM is used for sales documents where the parent item is listed only as a sales item, not an inventory item. Once the parent is selected in the sales document all of the children appear as sub-items. You can update the quantities of the parent or children, but you cannot delete children or add new children or sub-items to the package in the sales document. An example of this would be a computer printer and its components where the parent would be the package or sales item and the children would be the inventory items inside the package