Please Explain to me step by step with formulas Thanks.

1. Over the years, O'Brien Corporation's stockholders have provided $80 million of capital, when they purchased new issues of stock and allowed management to retain some of the firm's earnings. The firm now has 3 million shares of common stock outstanding, and it sells at a price of $60.00 per share. How much value has O'Brien's management added to stockholder wealth over the years, i.e., what is O'Brien's MVA in million?