Parker exercised a nonstatutory stock option on May 31, 2022. He paid $8,000 for 100 shares of his company's stock. The fair market value of the shares on that date was $10,000. Although Parker continues to hold these shares, he included the $2,000 difference between the fair market value and the purchase price as compensation income when he filed his 2022 return. What is Parker's basis in the stock