Federated Department Stores Inc, owner of Macy's and Bloomingdale's, on Thursday posted an expected 2.8 per cent slide in February same-store sales and a dip in total sales for the month. The company, which operates more than 450 stores, said total sales for the four week period ended March 2 were $1.048 billion this year, compared to $1.079bn in February 2001.