Final answer:
Zinc Co. should report a total of $1,680,000 as stockholders' equity in its December 31, 2017 balance sheet. This value is calculated by summing the common stock, additional paid-in capital, appropriated and unappropriated retained earnings, and then subtracting the treasury stock and net unrealized loss on marketable securities.
Step-by-step explanation:
To calculate Zinc Co.'s total stockholders' equity as of December 31, 2017, we would sum the balances of common stock, additional paid-in capital, and both appropriated and unappropriated retained earnings, and then subtract the treasury stock and the net unrealized loss on non-current marketable equity securities.
Adding the amounts, we get:
$600,000 + $800,000 + $150,000 + $200,000 - $50,000 - $20,000 = $1,680,000
Therefore, the total stockholders' equity reported on the balance sheet would be $1,680,000.