On January​ 1, 2019, Chin Corporation issued $3,400,000​, 16​%, 5−year bonds. The bond interest is payable on January 1 and July 1. The bonds sold for $3,619,600. The market rate of interest for these bonds was 14​%. Under the effective−interest ​method, what is the interest expense for the six months ending July​ 1, 2019?