United Retail Group Inc today said total sales increased 12 per cent to $41.4 million during May 2002 compared with $36.9 million during May 2001. Comparable store sales increased 9 per cent for the month. For the fiscal year-to-date, the large-size women's fashion apparel, footwear and accessories retailer said total sales increased 8 per cent to $157.0 million compared with $145.7 million in the same period last year.