Based on the Corporate Valuation Model, Wang Inc

Based on the corporate valuation model, Wang Inc.'s value of operations is $750 million. Its balance sheet shows $100 million notes payable, $200 million of long-term debt, $40 million of common stock (par plus paid-in-capital) , and $160 million of retained earnings. What is the best estimate for the firm's value of equity, in millions?

A) $386
B) $406
C) $428
D) $450
E) $473