definiens: means the total gross proceeds to Acuity on sales to Third Parties representing sales actuallycollected by Acuity and its Affiliates, less deductions for the following to the extent actually paid or allowed withrespect to the such sales : ( a ) sales and excise taxes and duties ( including import duties ) paid or allowed by a selling party and any othergovernmental charges imposed upon the manufacture or sale, after giving effect to any rebates or refunds relating tosuch taxes or duties received by Acuity ; ( b ) rebates and chargebacks ( including rebates to social and welfare systems ) actually paid ; ( c ) allowances, chargebacks, and credits to Third Parties on account of rejected, damaged, outdated, returned, withdrawn, or recalled product or on account of retroactive price reductions affecting such product ; and ( d ) amounts paid to Third Parties on account of rebate payments, including Medicaid rebates