Ying Import has several bond issues outstanding, each making semiannual interest payments. The bonds are listed in the following table.

Bond Coupon Rate Price Quote Maturity Face Value

$15\mathrm{.}1\%104\mathrm{.}865$ years $ $59,000,000$

$26\mathrm{.}7113\mathrm{.}628$ years $54,000,000$

$36\mathrm{.}6112\mathrm{.}1715\mathrm{.}5$ years $74,000,000$

$45\mathrm{.}9101\mathrm{.}4125$ years $81,000,000$

If the corporate tax rate is $24$ percent, what is the aftertax cost of the company$$s debt?