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	8.50%	106.0	5 years	$19,000,000
2	6.50	94.4	8 years	39,000,000
3	8.20	104.8	15.5 years	44,000,000
4	8.70	94.6	25 years	59,000,000

If the corporate tax rate is 25 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.)