I haven't been to Costco for a few weeks, but I would be willing to bet that sales are likely up significantly when they are reported tonight. The times that I have been there lately, the stores only seem to get busier and busier.
Once again Costco is expanding sales at a significant clip.
Always remember it is best to own stocks at reasonable prices that are great companies. Buffett learned this lesson long ago at the urging of Charlie Munger.