English to Spanish Law/Patents Law: Contract(s)

No encuentro este término. ¿Podrán ayudarme con el equivalente en español? ¡Gracias desde ya!
Esta es la definición:

“Net Net Amount” shall mean the net amounts invoiced by Media owners for spaces ordered by the Client and/or the Client Affiliates after deduction of all discounts, rebates or similar advantages granted by Media owners. In addition, it is clearly understood that the Client and the Client Affiliates shall benefit from year-end rebates or discounts granted by the Media owners in connection with the total volume of spaces ordered by XX with such Media on behalf of all XX clients (e.g. “cumul des mandáis”) through a retroactive adjustment of the Net Net Amount. Therefore, the level of the Net Net Amount shall be mutually estimated between XX and the Client or the Client Affiliates at the beginning of the year, this estimate shall be adjusted on June 30, and shall be finally reviewed and agreed upon by the Parties at the beginning of the foliowing year, when the final reconciliation will be made.