Retailer of action sports related apparel, footwear, equipment and accessories Zumiez Inc. has reported that total net sales for the four-week period ended May 27, increased 39.5% to $15 million, compared with $10.7 million for the four-week period in 2005. The company's comparable store sales increased 18.2% versus a comparable store sales increase of 10.2% in the last year.