As of Dec 31, 2021, Salt & Pepper Inc. (S&P) had 600,000 common shares outstanding (no preferred shares issued). Further, S&P had granted 180,000 stock options to some executives. These options gave the executives the right to purchase S&P's shares at the option price of $74 per share. As of today, none of these options have been exercised. The "average" market price of S&P's common shares during 2021 was $100. When calculating Diluted EPS for 2021, what number of shares should be used?

733,200

600,000

646,800

663,244