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

$18\mathrm{.}80\%106\mathrm{.}34$ years $ $22,000,000$

$26\mathrm{.}8094\mathrm{.}17$ years $36,000,000$

$38\mathrm{.}50105\mathrm{.}114\mathrm{.}5$ years $41,000,000$

$49\mathrm{.}0094\mathrm{.}924$ years $56,000,000$

If the corporate tax rate is $23$ percent, what is the aftertax cost of the company$$s debt?