Mills Corporation acquired as a long-term investment $260 million of 5% bonds, dated July 1, on July 1, 2018. Company management is holding the bonds in its trading portfolio. The market interest rate yield was 3% for bonds of similar risk and maturity. Mills paid $300 million for the bonds. The company will receive interest semiannually on June 30 and December 31. As a result of changing market conditions, the fair value of the bonds at December 31, 2018, was $280 million Required 1. & 2. Prepare the journal entry to record Mills' investment in the bonds on July 1, 2018 and interest on December 31, 2018, at the effective (market) rate. 3. At what amount will Mills report its investment in the December 31, 2018, balance sheet? 4. Suppose Moody's bond rating agency upgraded the risk rating of the bonds, and Mills decided to sell the investment on January 2, 2019, for $315 million. Prepare the journal entries to record the sale