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	Maturity	Face Value
1	8.90%	105.4	3 years	$24,000,000
2	6.60	95.0	6 years	44,000,000
3	8.60	104.2	13.5 years	49,000,000
4	9.10	106.1	23 years	64,000,000

If the corporate tax rate is 24 percent, what is the aftertax cost of the companys debt? (Do not round intermediate calculations and enter your answer as a percent rounded to 2 decimal places, e.g., 32.16.)