CAIRO, Aug 26 (Reuters) - Egypt's state grain buyer, the General Authority for Supply Commodities (GASC), on Tuesday bought 175,000 tonnes of Russian and Romanian wheat for shipment on Sept. 21-30, GASC and traders said.

Two traders gave the following breakdown of the purchase on a cost and freight basis: 60,000 tonnes of Romanian wheat from Invivo at $257.77 a tonne 60,000 tonnes of Russian wheat from Bunge at $259.29 a tonne 55,000 tonnes of Russian wheat from Bunge at $259.43 a tonne (Reporting by Yasmine Saleh and Michael Hogan; editing by Keiron Henderson)