Costco Wholesale (COST -0.43%) can be a fun place to shop. In exchange for an annual membership fee, it offers low-priced products its customers want. It can also be a fun stock. Following solid financial results this year, the stock price recently hit a new all-time high of $1,008.But let's find out how many shares an investor would have today (and what they would be worth) if the investor bought just one share when the company went public on Dec. 5, 1985.How to turn $10 into $5,748Costco went public at $1 ...