On March 1, RMH Premium Diamonds completed the issuance of 6%, 10-year bonds with a face value of $600,000, interest to be paid semiannually, each March 1 and September 1. The bonds were issued at 104. The company operates on a December 31 fiscal year-end. By the end of the first year, after adjusting, closing, and reversing entries, how much of the premium has been amortized? a. $2,000 b. $400 c. $1,000 d. $0