definiens: shall mean shall me an for a Product in a particular period, the sum of ( 1 ) and ( 2 ): ( 1 ) the gross amount invoiced by Pieris for sale of Products to Third Parties in the Field and Territo ry, excluding transactions transferring a Product to a Pieris Affiliate, Sublicensee, distributor and/or a gent for resale, less the sum of the following items : ( a ) customary trade, prompt payment, quantity or cash d iscounts to the extent actually allowed and taken ; ( b ) amounts repaid or credited by reason of rejection, recalls or ret urns ; ( c ) to the extent separately stated on purchase orders, invoices or other documents of sale, any taxes, duties, tariffs or other governmental ch arges levied on the production, sale, transportation, delivery or use of a Product ; ( d ) outbound transportation costs prepaid or allowed and costs o f insurance of transit ; ( e ) discounts or rebates or other payments required by law to be made under Medicaid, Medicare or other governmental special medical assi stance programs to the extent actually a llowed and taken ; and ( f ) amounts written off by reason of uncollectible bad debt, but not to exceed * of the Net Sales per calendar year