Ying Import has several bond issues outstanding, each making semiannual interest payments. The bonds are listed in the following table. Coupon Bond Rate Price Quote Maturity Face Value $ 1 6.4% 106.36 6 years 44,000,000 234 7.9 114.92 9 years 39,000,000 7.6 113.47 16.5 years 59,000,000 7.2 102.71 26 years 66,000,000 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 %