Bonds Accounting Issue

[SAPR]

Dear friends, could you help me solve this quiz:
The December 31, 1998, balance sheet of Drabek Corporation includes
the following items:

9% bonds payable due December 31, 2007 $500,000
Unamortized premium on bonds payable 13,500

The bonds were issued on December 31, 1997, at 103, with interest
payable on July 1 and December 31 of each year. Drabek uses
straight-line amortization.
On March 1, 1999, Drabek retired $200,000 of these bonds at 98 plus
accrued interest. What should Drabek record as an extraordinary
gain on retirement of these bonds? Ignore taxes.
a. $9,400.
b. $5,400.
c. $9,300.
d. $10,000.

[Dagabie]

1997 Dec. 31
Proceeds from the issue of Bonds
$500,000 x 103/100 = $515,000.

Less nominal value of
bonds $500,000.

Premium on the issue ($515,000 - $500,000) = $15000.
Amortization rate p.a. ($15,000/10years i.e. 1997 to 2007) = $1,500.

1998
Interest payable at:
1998 July1 $500,000 x 9% x 6mths/12mths = $22,500.
1998 Dec31$500,000 x 9% x 6mths/12mths = $22,500.

Amortised premium for 1998 = $1,500.
Unamortised balance at 1998 ($15,000 - $1,500) = $13,500.

1999
March 1st Interest payable on retirement of bonds:
$200,000 x 9% x 2mths/12mths(dec.31 to mar.1) = $3,000.

Cash payment for retirement of bonds:
$200,000 x 98/100 = $196,000.

Nominal value of bonds $500,000
Add premium $15,000
Total initial amount received $515,000

Therefore value of bonds retired
$200,000/$500,000 x $515,000 = $206,000.

Extraordinary gain:
Value of bonds retired $206,000
less actual amount paid on retirement of bonds $196,000 = $10,000
less amortised premium on bonds retired from dec.1997 to mar. 1999($200,000/$500,000 x $15,000 x 14mths/12mths = $700.

EXTRA ORDINARY GAIN = $9,300($10,000 - $700)

The answer is (c).

If you have different answer let me know.