definiens: shall mean, for a given period, the gross amount in voiced for the sale of the CoStasis Products anywhere in the Territory during such peri od that are attributable to sales of CoStasis Produ cts by [COMPANY] or by an Affiliate, subdistributor or oth er agent ( appointed in accordance with Section 2.2 ) on behalf of [COMPANY], less the sum of the following items : ( a ) discounts ( including cash discounts and quantity di scounts ), cash and non - cash coupons, refunds, rebates, credits, chargebacks, vouchers, retroactiv e price adjustments and any other allowances, including amounts written off by reason of uncollec tible debt, that effectively reduce the net selling price, in each case, as may be extended in the ordi nary course of business consistent with past practi ce or as customary in the industry, including those gr anted or given to managed health care organizations, wholesalers and other distributors, buying groups, health care insurance carriers, or to federal, stat e and local governments, their agencies ; ( b ) actual CoStasis Products credits, returns and allow ances ; ( c ) any tax imposed on the sale, delivery or use of the CoStasis Products, including without limitation, sales, use, excise or value added taxes, provided i n each such case that such tax is included in the g ross amount invoiced ; and ( d ) allowances for reasonable and customary shipping ex penses, provided that such allowance is included in the gross amount invoiced