Canton Corporation owns 3,000 of the 10,000 outstanding shares of Wallis Corporation. During 2013, Wallis Corporation earns $500,000 and pays cash dividends of $100,000. What amount should Canton show in the investment account at December 31, 2013 if the beginning of the year balance in the account was $600,000?
a) $600,000
b) $630,000
c) $720,000
d) $750,000