Shanken Corp. issued a bond with a maturity of 16 years and a semiannual coupon rate of 6 percent 2 years ago. The bond currently sells for 91 percent of its face value. The book value of the debt issue is $40 million. In addition, the company has a second debt issue on the market, a zero coupon bond with 11 years left to maturity; the book value of this issue is $30 million and the bonds sell for 50 percent of par. The companys tax rate is 38 percent. What is the companys total book value of debt?