The 2021 income statement for Anderson TV and Appliance reported net sales of $420,000 and net income of $65,000. Average total assets for 2021 was $800,000. Shareholders' equity at the beginning of the year was $500,000, and $20,000 was paid to shareholders as dividends. There were no other shareholders' equity transactions that occurred during the year.

I need help finding the average stockholder equity