Key Takeaways Costco's August comp sales rose 6.3%, with e-commerce leading at 18.4% growth.Net sales climbed 8.7% to $21.56B, extending a streak of monthly gains.Costco trades at a P/E of 48.05, a premium to peers but below its yearly median.Costco Wholesale Corporation’s (COST) August sales report brings fresh insights into the retail giant’s performance. As a leader in the warehouse club space with a track record of steady growth, Costco stock has long been a favorite among investors. However, with the l ...