BSX Corp made its initial public offering (IPO) ten years ago when it issued 1 million shares of common stock at $5 per share. Three years later, BSX issued an additional 2 million shares of common stock at $20 per share. BSX has not repurchased any shares of its stock. Last year BSX reported retained earnings of $520 million on its balance sheet. During the current year, BSX reported net income of $50 million and paid $5 million in dividends to its common shareholders. What is the book value of equity for BSX at the end of the current year? Select one: a. $520 million b. $580 million c. $705 million d. $610 million