Marten Co. purchased $500,000 of 8%, 5-year bonds from Duggan, Inc. on January 1, 2008, with interest payable on July 1 and January 1. The bonds sold for $520,790 at an effective interest rate of 7%. Using the effective-interest method, Marten Co. decreased the Available-for-Sale Debt Securities account for the Duggan, Inc. bonds on July 1, 2008 and December 31, 2008 by the amortized premiums of $1,770 and $1,830, respectively. At April 1, 2009, Marten Co. sold the Duggan bonds for $515,000. After accruing for interest, the carrying value of the Duggan bonds on April 1, 2009 was $516,875. Assuming Marten Co. has a portfolio of Available-for-Sale Debt Securities, what should Marten Co. report as a gain or loss on the bonds?