definiens: means the gross amounts invoiced by Purchaser and its Affiliates and licensees for sales or other dispositions of Products to third pa rties that are not Affiliates or licensees, less th e following items, as allocable to such Products ( if not previo usly deducted from the amount invoiced ): ( a ) trade, cash or quantity discounts, credits or allowances actual ly allowed ; ( b ) charge back payments, administrativ e fees, price reductions and rebates allowed or grant ed to managed care organizations, government agenci es or trade customers, including wholesalers and chain and pharmacy buying groups ; ( c ) credits actually allowed for claims, allowances for damaged goods, r etroactive price reductions or returned goods ; ( d ) prepaid freight, postage, shipping, customs dut ies and insurance charges ; and ( e ) sales taxes, val ue added taxes, duties and other governmental charges actually paid in connection with the sale, to the e xtent not reimbursed ( but excluding what are commonly kno wn as income taxes ) . Such amounts shall be determined in accordance with U.S. generally applic able accounting principles, consistently applied, a nd may include using accrual accounting where applicab le . In no event will any particular amount identifi ed above be deducted more than once in calculating Net Sales ( i.e., no of reductions )