Ying Import has several bond issues outstanding, each making semiannual interest payments. The bonds are listed in the following table. If the corporate tax rate is 30 percent, what is the aftertax cost of Ying's debt? (Do not round your intermediate calculations.)

Bond	Coupon Rate	Price Quote	Maturity	Face Value
1	6.5%	106	6 yrs	$23,000,000
2	7.7	112	10	44,000,000
3	6.6	103	23	43,000,000
4	7.4	114	34	55,000,000

6.15%

4.09%

4.13%

4.52%

4.31%