Ying Import has several bond issues outstanding, each making semiannual interest payments. The bonds are listed in the following table. Bond Coupon Rate 5.2% 6.8 6.7 6.0 WN Price Quote Maturity 104.96 6 years 113.72 9 years 112.27 16.5 years 101.51 26 years Face Value $58,000,000 53,000,000 73,000,000 80,000,000 If the corporate tax rate is 23 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 %