On January 1,2020 , Cullumber Company purchased 4% bonds, having a maturity value of $590,000 for $502,223. The bonds provide the bondholders with a 6% yield. They are dated January 1, 2020, and mature January 1,2027 , with interest paid on June 30 and December 31 of each year. Cullumber Company uses the effective-interest method to allocate unamortized discount or premium. The bonds are classified as available-for-sale category. The fair value of the bonds at December 31 of each year-end is as follows. (a) Prepare the journal entry at the date of the bond purchase. (b) Prepare the journal entries to record the interest revenue and recognition of fair value for 2020. (c) Prepare the journal entry to record the recognition of fair value for 2021. (Round answers to 2 decimal places, e.g. 2,525.25. Credit account titles are automatically indented when amount is entered. Do not indent manually. If no entry is required, select "No Entry" for the account titles and enter O for the amounts.) Interest Revenue Debt Investments Interest Revenue (To record interest received) Fair Value Adjustment Unrealized Holding Gain or Loss - Equity (To record fair value adjustment) (c) Dec. 31,2021 Unrealized Holding Gain or Loss - Equity Fair Value Adjustment