Zakaryan Corporation was organized on January $1,2020.$ The corporation's governing documents authorized the issue of $100,000$ shares of $$1$ par common stock. During $2020,$ Zakaryan had the following transactions relating to stockholders' equity:

Issued $10,000$ shares of common stock at $$14$ per share.

Issued $20,000$ shares of common stock at $$16$ per share.

Reported a net income of $$200,000.$

Paid dividends of $$100,000.$

Purchased $3,000$ shares of treasury stock at $$20($part of the $20,000$ shares issued at $$16).$

What is total shareholders' equity at the end of $2020?$

$$600,000.$

$$540,000.$

$$500,000.$

$$400,000.$