On January​ 1, 2018, Wonderland Sales issued $28,000 in bonds for $20,300. These are eight−year bonds with a stated interest rate of 13​% and pay semiannual interest. Wonderland Sales uses the straightminus−line method to amortize the bond discount. What is the bond carrying amount after the first interest payment on June​ 30, 2018?​ (Round your intermediate answers to the nearest​ dollar.)