Cosan the world's biggest sugarcane producer, is hopeful customers will return after the company was removed from a government labor blacklist on Monday...Late the same day, state development bank BNDES, Brazil's largest source of long-term corporate loans, said it resumed transactions with Cosan...U.S. retailer Wal-Mart (WMT.N), the world's largest supermarket chain, was the latest client to resume sales of Cosan products after banning them last week...