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 8.80% 106.8 2 7.00 93.6 3 8.50 105.6 4 9.00 95.4 Maturity 4 years 7 years 14.5 years 24 years Face Value $27,000,000 31,000,000 36,000,000 51,000,000 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.) Aftertax cost of debt %