Everett, Washington-based Zumiez Inc. (ZUMZ) reported comparable-store sales growth of 17.0% for September 2010. This compares with a 0.8% decrease in the year-ago period. The growth in comparable-store sales was driven by an increase in transactions, slightly offset by lower dollars per transaction. Total sales for September improved 22.5% to $44.7 million, compared with $36.5 [...] (ZUMZ) Zumiez Reports Strong September Comparable-Store Sales