On April $30,$ one year before maturity, Middleton Company retired $$200,000$of its $9\%$ payable at the current market price of $101(101\%$ of the bond face amount, or $$200,000$ x $1\mathrm{.}01=$$$202,000).$ The bond book value on April $30,$ is $$196,000,$ reflecting an unamortized discount of $$3,400.$ Bond interest is currently fully paid and recorded up to the date of retirement. What is the gain or loss on retirement of these bonds? Is this gain or loss a real economic gain or loss? Explain