Key Takeaways Costco's August comparable sales rose 6.3%, led by gains across U.S., Canada, and international.E-commerce comps surged 18.4% in August, building on double-digit gains in prior months.Net sales for August hit $21.56B, up 8.7$19.83B in the year-ago period.Costco Wholesale Corporation (COST) sustained its steady comparable sales growth in August, reflecting its ongoing strength with value-conscious consumers. The company’s competitive pricing and quality merchandise — available both in-st ...