Unifi, Inc, (NYSE: UFI), today released operating results for its fourth quarter of fiscal year 2000.Net sales for the fourth quarter ended June 25, 2000 increased to $338.8m from $307.7m and $319.3m, in the June 1999 and March 2000 quarters respectively. These increases in sales are due to the company's growth in polyester unit volume domestically and throughout Europe and Brazil.