Marin Co. sells $483,000 of 10% bonds on March 1, 2017. The bonds pay interest on September 1 and March 1. The due date of the bonds is September 1, 2020. The bonds yield 12%. Prepare a bond amortization schedule using the effective-interest method for discount and premium amortization. Amortize premium or discount on interest dates and at year-end. Prepare all of the relevant journal entries from the time of sale until the date indicated. (Assume that no reversing entries were made.)