TunaCo purchases 25% of Stanley, Inc. on January 1 of the current year for $500,000. This acquisition gives TunaCo the ability to apply significant influence to Stanley's operating and financing policies and TunaCo elects to use the equity method of accounting. Stanley reports assets on that date of $1,600,000 with liabilities of $400,000. One building with a 15-year life has a book value of $100,000 and a fair market value of $400,000. During the current year, Stanley, Inc. reports net income of $140,000, while paying out dividends of $70,000 for the year. What is the Investment in Stanley account balance in TunaCo's accounting records at the end of the current year?

Will you help me? In this problem, I was thrown of by the statement that one building with a 15 year life has a book value of $100,000 and a fair market value of $400,000.