0. On June 30,2020 , Omara Co. had outstanding 8%,$8,000,000 face amount, 15 -year bonds maturing on June 30,2030 . Interest is payable on June 30 and December 31 . The unamortized balance in the bond discount account on June 30,2020 was $360,000. On June 30,2020 , Omara retired all of these bonds at 94 . What net carrying amount (i.e.. book value) should be used in computing gain or loss on this early extinguishment of debt? a. $7,920,000. b. $7,720,000. c. $7,640,000 d. $7,520,000