A company had 4,500,000 shares of common stock outstanding December 31, 2017. An additional 2000,000 chares are issued on April 1, 2018 and 480,000 more on September 1, 2018. On October 1, 2018 rote issued $6,000,000 of 9% convertible bonds. Each $1000 bond is convertible into 40 shares of common stock. No bonds have been converted.

The number of shares to be used in computing basic earnings per share on December 31, 2018 is:

A) 5,180,000

B) 1,368,333

C) 4,500,000

D) 5,580,000

E) 4,810,000