U.S auto parts retailer CSK Auto Corp. has announced a 15% increase in sales for the fiscal year ended Feb. 4 to $1.87 billion U.S. Fourth quarter revenue also was up to $464 million compared to $396 million a year ago, however, officials noted that the latest fourth quarter and fiscal year included an additional week of sales. Phoenix-based CSK Auto is a specialty retailer focused on the automotive aftermarket with stores including Checker Auto Parts, Schuck’s Auto Supply, Kragen Auto Parts and Murray’s Discount Auto. Officials said the company met its goal of opening 55 net new stores during the past year. At fiscal year-end, the company operated 1,327 stores in 22 states. Earnings were not reported at this time.