Specialty retailer Pacific Sunwear of California Inc on Thursday posted a 6.7 per cent drop in April same-store sales from the year-ago period but said total sales climbed 9.1 per cent to $47.9 million. The Anaheim-based company said first quarter same-store sales increased 0.6 per cent, while total sales jumped 17 per cent to $161.7m from $137.7m in 2001.