Original sentence: The plant is the largest project within the Commonwealth of Independent States with participation of the Russian companies, their total investment estimated at US$700 million
Edited sentence: It cost US$720 million.The Sangtuda 1 Hydroelectric Power Plant consist of four units with total capacity of 670 MW and producing 2.7 TWh electricity per year.The plant is the largest project within the Commonwealth of Independent States with participation of the Russian companies