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 33 percent, what is the aftertax cost of Ying's debt?

Bond	Coupon Rate	Price Quote	Maturity		Face Value
1	5.7%	103	5	years	$ 20,000,000
2	6.6	108	9	years	35,000,000
3	5.2	99	20	years	43,000,000
4	6.6	113	30	years	56,000,000