On January 1, 2003, $1,000,000, 10-year, 10% bonds, worn issued for $970,000. Interest is paid semiannually on January 1 and July 1, if the issuing corporation uses the straight-line method to amortize discounts on bonds payable, the semi-annual amortization amount is: a. $1, 500. b. $3,000. c. $4,000. d. $10,000. e. None of the above