Costco Wholesale Corp. COST, +1.95% shares dropped more than 3% in the extended session Wednesday after the retailer said its November sales rose 5.7% to $19.17 billion, following a 7.7% rise in October. Costco also reported a double-digit decline for e-commerce sales, once a bright spot for the retailer amid pandemic-fueled stockpiling and fear of shopping in person. Costco said total same-store sales rose 4.3%, but e-commerce sales dropped 10.1%. Shares of Costco ended the regular trading day up nearly 2%.