四、Clark Enterprises, which began operations in 2013, invests in long-term available-for-sale securities. Following is a series of transactions and events involving its long-term investment activities. 2013 Mar. 10 Purchased 1,000 shares of Apple at $23.00 per share plus $240 commission. Apr. 7 Purchased 1,300 shares of Ford at $46.20 per share plus $225 commission. Sept.1 Purchased 1,500 shares of Polaroid at $25.00 per share plus $195 commission. Dec. 31 Per share market values for stocks in the portfolio are: Apple, $24.00; Ford, $42.00; Polaroid, $27.00. 2014 Apr. 26 Sold 1,300 shares of Ford at $44.00 per share less a $250 commission. June 2 Purchased 1,800 shares of Duracell at $19.25 per share plus a $235 commission. June 14 Purchased 600 shares of Sears at $22.50 per share plus a $470 commission. Nov. 27 Sold 1,500 shares of Polaroid at $29 per share less a $198 commission. Dec.31 Per share market values for stocks in the portfolio are: Apple, $26.00; Duracell, $18.00; Sears, $25.00. Required