definiens: shall mean the aggregate gross sales actually rec eived by CUBIST from sales of a Product sold directly by CUBIST or its Affiliate to a Third Party ( that is not an Affiliate or Sublicensee of CUBIST unless the Affiliate or Sublicensee is the end user of the Product ) after deducting, if not previously deducted, from the amount received the following amounts rela ted specifically to such sales and not otherwise re covered or reimbursed to CUBIST or its Affiliate : ( a ) trade an d quantity discounts in amounts customary in the tr ade and actually allowed and taken ; ( b ) returns, rebates, c redits and allowances in amounts customary in the t rade ; ( c ) chargebacks paid on sale or dispensing of Product ; and ( d ) sales or excise taxes, freight, postage, tr ansportation, insurance charges, custom duties and other governme ntal charges