Rolf's Pets Inc. purchased a portfolio of held-for-trading securities during 2014. The cost and fair value of this portfolio on December 31, 2014, was as follows:

On April 3, 2015, Rolf's Pets Inc. purchased 400 shares of Cookies Ltd., at $40.75 per share. On December 31, 2015, the trading security portfolio had the following cost and fair value:

Provide the journal entries to record the following:
a. The adjustment of the held-for-trading investments to fair value on December 31, 2014.
b. The April 3, 2015, purchase of Cookies Ltd. shares.
c. The adjustment of the held-for-trading investments to fair value on December 31, 2015.