One of your duties for your company is to calculate earnings per share. Your company has 400,000 common shares outstanding on 1/1/19. On April 1 they issue 97,000 share of common and 2,500 shares of preferred stock. On June 1 they acquired 37,500 from the open market to use as treasury stock. On November 1 they sold 32,000 shares of the treasury stock below their original cost. Calculate the weighted average common shares outstanding for purposes of the December 31,2019 basic earnings per share calculation (ignore rounding).

A. 400,000 B. 499,958 C. 456,208 D. 437,943