The parties mentioned above have concluded this sales contract (the “contract”) under the following terms: both parties agree that this closing date should be set no later than ten days after the signing of this contract by the parties. All obligations relating to the existing sublease agreement, including rental, maintenance, taxes and other charges resulting from the rental agreement, remain the responsibility of the seller until the conclusion of the rental agreement. Buyer agrees to accept and confidentially keep the licensed software and documentation. . . .