The shareholders' equity of Yam Enterprises includes $$500$ million of no$-$par common stock and $$200$ million of $5\%$ cumulative preferred stock. The board of directors of Yam declared cash dividends of $$30$ million in $2024$ after paying $$6$ million cash dividends in both $2023$ and $2022.$ What is the amount of dividends common shareholders will receive in $2024?$

$$ $$8$ million

$$12$ million

$$18$ million

$$20$ million