Vontkins Inc. owned all of Quasimota Co. The subsidiary had bonds payable outstanding on January 1, 2017, with a book value of $240,000. The parent acquired the bonds on that date for $270,000. Subsequently, Vontkins reported interest income of $25,000 in 2017 while Quasimota reported interest expense of $29,000. Consolidated financial statements were prepared for 2018. What adjustment would be required for the retained earnings balance as of January 1, 2018?