How do you calculate cost of debt
I have attached the question I was given. I know you can't give me an answer but can you at least help explain how to get the problem started. I keep drawing a blank when trying to start this question.
Calculating Cost of Debt
Jiminy's Cricket Farm issued a 30-year, 11 percent semi-annual bond 9 years ago. The bond currently sells for 108 percent of its face value. The book value of the debt issue is $18 million. The company's tax rate is 33 percent.
In addition, the company has a second debt issue on the market, a zero coupon bond with 9 years left to maturity; the book value of this issue is $78 million and the bonds sell for 80 percent of par.
The company's total book value of debt is $ . Its total market value of debt is $ (Enter your answer in dollars, not millions of dollars.). Your best estimate of the aftertax cost of debt is percent. (Do not include the percent sign (%). Round your answer to 2 decimal places, e.g. 32.16.)