Costco Wholesale Corp COST is rolling up to earnings season with a full cart and a few mixed signals – and Wall Street is watching closely.The wholesale giant reports fiscal third quarter results after the bell Thursday, with analysts expecting earnings per share of $4.24 on revenue of $63.19 billion. It's a moment of truth for a stock that's gained 25% over the past year but has wobbled slightly in recent weeks, slipping nearly 2% in the past month.Read Also: Costco Earnings Are Imminent; These Most Accura ...