The December 31, 2020, balance sheet of Riverbed Corp. is as follows. 10% callable, convertible bonds payable (semiannual interest dates April 30 and October 31; convertible into 6 shares of $25 par value common stock per $1,000 of bond principal; maturity date April 30, 2026) $405,000 Discount on bonds payable 13.312 $391,688 On March 5, 2021, Riverbed Corp. called all of the bonds as of April 30 for the principal plus interest through April 30. By April 30, all bondholders had exercised their conversion to common stock as of the interest payment date. Consequently, on April 30, Riverbed Corp. paid the semiannual interest and issued shares of common stock for the bonds. The discount is amortized on a straight-line basis. Riverbed uses the book value method. Prepare the entries to record the interest expense and conversion on April 30, 2021. Reversing entries were made on January 1, 2021. (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.)