On June 30, 2021, Marc Industries had outstanding $800 million of 8% convertible bonds that mature on June 30, 2022. Interest is payable each year on June 30 and December 31. The bonds are convertible into 60 million shares of $10 par common stock. At June 30, 2021, the unamortized balance in the discount on bonds payable account was $40 million. On June 30, 2021, half the bonds were converted when Marc's common stock had a market price of $30 per share. When recording the conversion, Marc should credit paid-in capital-excess of par: a. $60 million. b. $80 million. c. $100 million. d. $120 million