Thumbs Up to Answers!!! just need a little help with some of my numbers being wrong if someone could also explain their numbers with an equation!

7/9 On July 1, 2021. Ayayai Corporation, a private company, purchased $489,600 of six-year, 9% Star Corporation bonds for $513,600. The bonds pay interest each June 30. The bonds were purchased to earn interest and the market interest rate at the time of purchase was 8%. The company uses the effective-interest method to amortize any premium or discount on debt security investments Prepare the required journal entries on July 1 and December 31, 2021, and June 30, 2022. (Credit account titles are automatically Indented when the amount is entered. Do not indent manually. If no entry is required, select "No Entry for the account titles and enter for the amounts.) Date Account Titles and Explanation Debit Credit July 1, 2021 Investments at Amortized Cost 513,600 Cash 513,600 (To record purchase of bond investment.) Dec 31, 2021 Interest Receivable 20,544 Investments at Amortized Cost Interest Revenue 20544 To accrue interest revenue.) June 30, 2022 44,010 Investments at Amore Cost Interest Revenue Interest Receivable 20:54 Trenerife