definiens: means the sum of all amounts invoiced by MedImmune and/or its Affiliates to Third Parties ( or by MedImmune 's licensees, sublicensees or Distributors ( as defined below ) ( in each case, other than [COMPANY] or [COMPANY] 's Affiliates ) to Third Parties ) during a given Royalty Period ( as defmed in Section 6.5(c ) ), for the sale of any given Product in the Royalty Territory to such Third Parties less ( in each case, with respect to such sales ): ( a ) the following credits, commissions, refunds, rebates, chargebacks, retroactive price adjustments, or credits which effectively reduce the net selling price to Third .Parties as detennined under accounting princip les generally accepted in the United States ( but only to the extent not already deducted from the invoice ), paid or credited to such Third Parties for : ( i ) any returned goods or free goods ; ( ii ) any discounts or allowances customary in the trade including, but not limited to, trade discounts, cash discounts, quantity discounts, volume discounts, prompt payment discounts or any other discounts regardless of description ; 6 ( iii ) any chargebacks or rebates including, but not limited to, cash, governmental and managed care rebates and hospital or other buying group chargebacks ; ( iv ) any fees paid to distributors, selling agents, group purchasing organizations or managed care entities ; ( v ) any amounts repaid or credited to such Third Parties for returned, rejected, recalled or damagcd Product ; and ( vi ) fifty perccnt ( 50 % ) of any royalty payments to W ARF based on sales of the Product under the W ARF License Agrcement