definiens: means, as to any period for which there is a determination thereof, Net Revenues less Collaboration Costs, provided that in no event shall any amounts deducted from gross . sales for the purpose of calculating the Net Sales component of Net Revenues also be counted toward the amount of Commercialization Costs . To the extent Net Revenues exceeds Collaboration Costs for the relevant period, such amount of difference shall be deemed and to the extent Collaboration Costs exceeds Net Revenues for the relevant period, such amount of difference shall be deemed means the sum of ( a ) Net Sales received with respect to a Collaboration Product plus, if any, ( b ) the fair market value of any consideration other than the proceeds of Net Sales ( whether in cash . payment in kind . exchange or other form ) actually received by a Party or its Affiliates from Third Parties with respect to transactions involving the research, development or commercialization of a Collaboration Product or exploitation of Collaboration Patent Rights or Collaboration Technology, to the extent such consideration is fairly and reasonably attributable to such Collaboration Product . Collaboration Patent Rights or Collaboration Technology