Derr Co. purchases stock investments (with insignificant influence) at a cost of \(\$ 250\) on December 15. This is its first and only purchase of such securities. On December 28, Derr received a \(\$ 15\) cash dividend from the stock investments. At year-end December 31, the stock investments had a fair value of \(\$ 200\).

a. Prepare the December 15 purchase entry for stock investments.

b. Prepare the December 28 receipt of cash dividends entry.

c. Prepare the December 31 year-end adjusting entry for the stock investments' portfolio.

d. Explain how each account in entry \(c\) is reported in financial statements.

e. Prepare the January 3 entry when a portion of its stock investments (that had cost \(\$ 37\) ) is sold for \(\$ 40\).