A. On March 14, 2014, the Plaintiff entered into a design service contract, etc. (hereinafter “instant service contract”) with a content that the Defendant receives from the Defendant the construction design for the urban environment rearrangement project in the Gu Won-si District in the cost of KRW 1,789,100,000 (excluding value-added tax) (hereinafter “instant service contract”).

Article 4 (Method of Calculation and Payment of Service Costs) ① The basis and method of calculation of the service costs shall be based on the consideration criteria, provided that, in the event that on-site conditions and design conditions are special or work conditions are added, the plaintiff and the defendant may consult with each other. ② The payment of the service costs may be made in lump sum or in installments. The payment of the service costs may be made in cash within 30 days from the date of the claim (However, the payment of the cost to be made in the service contract shall be made within one week from the date of the loan of the work costs from the association.

(3) At the time of receipt of construction deliberation, 20% project implementation authorization (the time of supply for reporting commencement) 30%, 30%, 10%, 10%, 100%, 3%, and 100%, from the completion of construction, the time of payment and the amount of payment shall be as follows, in principle, and may be adjusted through consultation between the Plaintiff and the Defendant. < Amended by Act No. 6 (Provision of Data and Duty of Good Faith)

B. 1 The Plaintiff, including the Plaintiff’s claim for the payment of down payment, was requested to issue an electronic tax invoice on an amount of 20% to be paid at the time of the service contract by the Defendant and request for the issuance of the electronic tax invoice.