January 1, 2010, Trent Company granted Dick Williams, an employee, an option to buy 100 shares of Trent Co. stock for $30 per share, the option exercisable for five years from date of grant. Using a fair value option pricing model, total compensation expense is determined to be $900. Williams exercised his option on September 1, 2010, and sold his 100 shares on December 1, 2010. whate Quoted market prices of Trent Co. stock during 2010 were: