It would be nice to include an option from the product information or inventory module the field for product markup contribution percentage margin levels, for purpose to secure certain items at no minimum or no maximum contribution ratio, as per specified from the product master record. Not having an option to prevent users to process sales or purchase transactions, the users maybe allowed to process certain items at a potential incorrect unit price. However the user may alternative conventionally visually identify and compare a purchase order from a sales order and conventionally process arithmetic operations to verify contribution percentage margins.