... when conducting price verification, pre-shipment inspection entities shall make appropriate allowances for the terms of the sales contract and generally applicable adjusting factors pertaining to the transaction; these factors shall include but not be limited to the commercial level and quantity of the sale, delivery periods and conditions, price escalation clauses, quality specifications, special design features, special shipping or packing specifications, order size, spot sales, seasonal influences, license or other intellectual property fees, and services rendered as part of the contract if these are not customarily invoiced separately; they shall also include certain elements relating to the exporter's price, such as the contractual relationship between the exporter and importer ...