definiens: shall mean gross invoice amou nts on sales ofproducts to customers less the following deductions : off invoice(i.e ., non - performance discounts ), quantity ( includ ing bracketpricing ) and cash discount and any other adjustment s, including butnot limited to those granted on account of price ad justments, billingerrors, rejected goods, damaged goods, recalls, ret urns, rebates, charge - backs and prime vendor rebates, reimbursemen ts or similarpayments granted or given to wholesalers or other d istributors, buying groups, health care insurance carriers or ot her institutions, freight and insurance charges billed to the custome r, custom or exciseduties, sales taxes and other taxes ( except income taxes ) or dutiesrelating to sales of products, and any bona fide pa yment made inrespect of any sale of products to any governmental orquasi - governmental body or agency