Marysa Corp. issued a 10-year, 9 percent semiannual bond 3 years ago. The bond currently sells for 96 percent of its face value. The book value of the debt issue is $50 million. In addition, the company has a second debt issue on the market, a zero-coupon bond with 10 years left to maturity; the book value of this issue is $30 million and the bonds sell for 58 percent of par. The companys tax rate is 21 percent.

a. What is the companys total book value of debt? (Do not round intermediate calculations and enter your answer in dollars, not millions of dollars, e.g., 1,234,567.)

b. What is the companys total market value of debt? (Do not round intermediate calculations and enter your answer in dollars, not millions of dollars, e.g., 1,234,567.)

c. What is your best estimate of the after-tax cost of debt? (Do not round intermediate calculations and enter your answer as a percent rounded to 2 decimal places, e.g., 32.16.)