Ying Import has several bond issues outstanding, each making semiannual interest payments. The bonds are listed in the following table. Bond Coupon Rate 6.4% 7.9 Price Quote Maturity 106.36 6 years 114.92 9 years 113.47 16.5 years 102.71 26 years Face Value $44,000,000 39,000,000 59,000,000 66,000,000 7.6 72 If the corporate tax rate is 24 percent, what is the aftertax cost of the company's debt? (Do not round intermediate calculations and enter your answer as a percent rounded to 2 decimal places, e.g., 32.16.) Cost of debt