The order quantity multiple that must be used in any order for the product placed with the supplier. Optional, but where supplied, must be preceded by at least one <OrderQuantityMinimum> element. For example with a minimum order quantity of 6 and a multiple of 4, orders for 6, 10 or 14 copies are acceptable, but orders for fewer than 6, or for 7, 8, 9 or 11 copies are not. If omitted, the minimum or any larger quantity may be ordered.