definiens: means the gross amounts invoiced by Buyer, its Af filiates, and any of its or their licensees or collaborators ( each, a ) for the sale, transfer or other distribution of XOMA Derived Products to Third Parties, less the following deduc tions to the extent reasonable and customary and ac tually incurred, allowed, paid, accrued or specifically al located in its financial statements, for : ( a)discounts ( including trade, quantity and cash di scounts ), cash and non - cash coupons, retroactive price reductions, and charge - b ack payments and rebates granted to any Third Party ( including to governmental entities or agencies, pu rchasers, reimbursers, customers, distributors, who lesalers, and group purchasing and managed care organizations or entities ( and other similar entities and instit utions ) ) ; [ * ] = Certain confidential information contained in this document, marked by brackets, has been omitte d and filed separately with the Securities and Exchange C ommission pursuant to Rule 24b-2 of the Securities Exchange Act of 1934, as amended