Article 709. Work

1. The contract shall specify the price of the work to be performed or the manner in which it is to be determined. 2. The price in the contract shall include compensation for the contractor ' s costs and the remuneration due to the contractor. 3. The price of the work may be determined by means of an estimate. 4. The cost of the work (estimate) may be the same as the cost of the work. 5. In the absence of other instructions in the contract, the price of the work is considered to be firm. The contractor is required to notify the employer in a timely manner if the contractor does not agree to exceed the price of p specified in the contract. Abots may waive the contract, in which case the contractor may request the employer to pay the price for the part of the work performed. 6. The contractor is not entitled to demand an increase in the firm price; a By the employer of the reduction, including where, at the time of the award of the contract, it was not possible to provide for the full scope of the work to be performed or the races necessary to do so. With the substantial increase in the cost of materials and equipment provided by the contractor and the services rendered by third parties, which could not have been foreseen in the conclusion of the d. a clause, the contractor has the right to claim an increase in the price set, and if the employer refuses to comply with this requirement, the avoidance of the contract in accordance with article 451 of the present Code.