definiens: shall mean the gross invoice price ( not including value added taxes, sales taxes, or similar taxes ) of Product sold by MERCK or its Affiliates t o the first third party after deducting, if not pre viously deducted, from the amount invoiced or received : 1.21.1 trade and quantity discounts other than early payme nt cash discounts ; 1.21.2 returns, rebates, chargebacks and other allowances ; 1.21.3 retroactive price reductions that are actually allo we d or granted ; 1.21.4 sales commissions paid to third party distributors and/or selling agents ; 1.21.5 a fixed amount equal to [ * ] of the amount invoiced to cover bad debt, early pa yment cash discounts, transportation and insurance and custom duties ; and 1.21.6 the standard inventory cost of delivery devices use d for dispensing or administering Product