Ying Import has several bond issues outstanding, each making semiannual interest payments. The bonds are listed in the table below. Bond Coupon Rate Price Quote 1 234 8.60% 6.80 106.6 Maturity 6 years Face Value $25,000,000 93.8 9 years 33,000,000 8.30 105.4 16.5 years 38,000,000 8.80 95.2 26 years 53,000,000 If the corporate tax rate is 21 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.) Aftertax cost of debt %