Carlsville Company, which began operations in 2017, invests its idle cash in trading securities. The following transactions are from its short-term investments in trading securities. 2017 Jan. 20 Purchased 1,000 shares of Ford Motor Co. at $27 per share plus a $130 commission. Feb. 9 Purchased 2,500 shares of Lucent at $38 per share plus a $195 commission. Oct. 12 Purchased 800 shares of Z-Seven at $8.10 per share plus a $95 commission. Dec. 31 Fair value of the short-term investments in trading securities is $133,700. 2018 Apr. 15 Sold 1,000 shares of Ford Motor Co. at $30 per share less a $290 commission. July 5 Sold 800 shares of Z-Seven at $10.75 per share less a $100 commission. July 22 Purchased 1,700 shares of Hunt Corp. at $33 per share plus a $225 commission. Aug. 19 Purchased 1,900 shares of Donna Karan at $44.00 per share plus a $105 commission. Dec. 31 Fair value of the short-term investments in trading securities is $232,225. 2019 Feb. 27 Purchased 3,700 shares of HCA at $35 per share plus a $430 commission. Mar. 3 Sold 1,700 shares of Hunt at $28 per share less a $125 commission. June 21 Sold 2,500 shares of Lucent at $35.75 per share less a $37 commission. June 30 Purchased 1,300 shares of Black & Decker at $47.50 per share plus a $595 commission. Nov. 1 Sold 1,900 shares of Donna Karan at $44.00 per share less a $124 commission. Dec. 31 Fair value of the short-term investments in trading securities is $199,900. Required: Prepare journal entries to record these short-term investment activities for the years shown. On December 31 of each year, prepare the adjusting entry to record any necessary fair value adjustment for the portfolio of trading securities.