A. The Defendant received a supply of and order for remodeling of the B Bridges located within the G Bridges, G, and among them, to the Plaintiff on November 27, 2015, each subcontract was made on March 14, 2016 with respect to painting works (the foregoing two works collectively referred to as “each of the instant works”), and the main contents of which are as follows:

hereinafter referred to as "the instant construction contract"

2) The name of the project: The date of commencement of the external drone project during the remodeling project: the date of completion on December 1, 2015: The name of the project: 24,200,000 won (including value-added tax): The date of commencement of the painting project during the remodeling project: the date of completion of the project: March 15, 2016: the contract amount on April 30, 2016: 39,60,000 won (including general conditions of the contract) [general conditions of the contract] (i) Article 18 (Adjustment of the contract amount due to the modification of the project site; when the details of the design do not coincide with the state of the project site; when there is any uncertainty, omission, error; or when the installation of additional facilities is required due to the modification of the project plan, etc.

(2) The design shall be modified. (2) When an increase or decrease in the volume of construction works occurs due to a modification of the design under paragraph (1), the contract amount shall be adjusted according to the following standards, and if necessary, the period of construction shall be extended or shortened. 1. The unit price for the increased or decreased construction works shall be determined on the basis of the unit price indicated in the calculation sheet provided for in Article 8.