​Jupiter, Inc. signed a oneminusyear $ 42 comma 000 note payable at 8​% interest on April​ 1, 2016. If​ Jupiter, Inc. only adjusts its accounts once a year at yearminus​end, how much interest expense was accrued on December​ 31, 2016?​ (Round any intermediate calculations to two decimal​ places, and your final answer to the nearest whole​ number.)