On May 20, 2011, Alexis Co. paid $750,000 to acquire 25,000 common shares (10%) of TKR Corp. as a long-term investment. On August 5, 2012, Alexis sold one-half of these shares for $475,000. What valuation method should be used to account for this stock investment? Prepare entries to record both the acquisition and the sale of these shares.