A company reported total stockholders' equity of $337,000 on its balance sheet dated December 31, 2018. During the year ended December 31, 2019, the company reported net income of $41,300, declared and paid a cash dividend of $9,300, declared and distributed a 10% stock dividend with a $11,300 total market value, issued additional common stock for $57,000, and paid $13,300 to purchase treasury stock. What is total stockholders' equity as of December 31, 2019?

a. $426,000.

b. $412,700.

c. $439,300.

d. $401,400.