A company reported total stockholders' equity of $334,000 on its balance sheet dated December 31, 2014. During the year ended December 31, 2015, the company reported net income of $41,600, declared and paid a cash dividend of $9,600, declared and distributed a 10% stock dividend with a $11,600 total market value, purchased treasury stock costing $13,600, and issued additional common stock for $54,000. What is total stockholders' equity as of December 31, 2015?

$420,000.

$433,600.

$394,800.

$406,400.