On 1/1/2009, Leatherback Brewing Company issued $250,000 face value bonds with annual coupon rate of 9% to yield 8%. Proceeds of the issue were $266,987.91. What was the amount of interest expense (within $1) related to these bonds for the full year 2009? a. $22,500. b. $21,336.21. c. $10,679.52 d.