definiens: shall mean shal l mean the gross revenue derived by VIACELL and/or its Affiliates and/or Sub licensees from the storage of oocytes cryopreserved through the use of Covered Pr oducts, less the following items but only insofar as they are actually taken ( as can be demonstrated by VIACELL 's records ) and actually pertain to the stor age of oocytes by VIACELL or its Affiliates or Sublicensees, and are included in such gross revenue : ( a ) Import, export, excise and sales taxes, and custom duties ; ( b ) Costs of insurance, packing, and transp ortation from the place of preparation to the point of storage ; and ( c ) Credit for rebates, returns, allowances, or trades ; provided that the aggregate of the amounts deducted from the gross revenue pursuant to clauses ( a ) through ( c ) above shall not exceed [ * * ] of the gross revenue to which such deductions relate