Catalogue and direct marketer of women's and men's apparel, Blair Corp, on Monday said it swung to a third quarter profit despite a slide in sales as it benefited from lower costs and improved margins. The Pennsylvania-based company said net income for the quarter ended September 30, 200 was $279,386 compared to a net loss of $3.3 million in the year-ago period, although net sales slipped to $117.8m from $123m.