Ying Import has several bond issues outstanding, each making semiannual interest payments. The bonds are listed in the table below:
Coupon Rate | 1.70 | 7.00 | 3.40 | 3.90
HelceiQuote | 105.2 | 95.2 | 104.0 | 185.9
Maturity | 7 years | 10 years | 17.5 years | 27 years
Issue Size | $22,000,000 | $40,000,000 | $47,000,000 | $62,000,000
If the corporate tax rate is 22 percent, what is the after-tax cost of the company's debt?