Please solve as soon as possible.

At January 1, 2023, Elan Corporation had 300,000 common shares outstanding (no prelerred issued). On March 1, the corporation issued 45,000 new shares to raise additional capital. On July 1 , the corporation declared and issued a 2 for 1 stock split. On October 1 , the corporation purchased on the open market 180,000 of its own shares at $35 each and retired them. Instructions Calculate the weighted average number of common shares outstanding to be used in calculating earnings per share for 2023