On January 1, Northern Inc. had 200,000 common shares authorized, 10,000 common shares issued, and 9,500 common shares outstanding.

a. On February 1, Northern purchased 800 treasury shares. After this transaction, how many common shares does Northern have authorized, issued, and outstanding?

b. On March 1, Northern issued 1,500 common shares. After this transaction, how many common shares does Northern have authorized, issued, and outstanding?

c. On April 1, Northern paid a cash dividend of $1 per common share. How much was paid in cash dividends?

d. On May 1, Northern sold all of its treasury stock. After this transaction, how many common shares does Northern have authorized, issued, and outstanding?