definiens: means the gro ss amounts invoiced for a Program Antibody or Product by Black Belt, its Affiliates and Licensees for sales or other commercial disposition of such Program Antibody or Product to a Third Party purchaser, less the following : ( a ) trade and quantity discounts ( other than early pay cash discounts ) actually allowed with respect to such sales which effectively reduce the selling price and are appropriately deducted from sales under appropriate accounting principles, consistently applied ; ( b ) returns, rebates, chargebacks and other allowances actually allowed with respect to such sales ; ( c ) retroactive price reductions that are actually allowed or granted ; ( d ) deductions to the gross invoice price of Program Antibody or Product imposed by regulatory authorities or other governmental entities ; ( e ) sales ( such as VAT or its equivalent ) and excise taxes, other consumption taxes, and customs duties ( excluding any taxes paid on the income from such sales ) to the extent the selling person is not otherwise entitled to a credit or a refund for such taxes or duties ; and - 3 - ( f ) a fixed amount equal to two percent ( 2 % ) of the amount invoiced to cover bad debt, early payment cash discounts, transportation and insurance