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

$16\mathrm{.}1\%106\mathrm{.}065$ years $ $41,000,000$

$27\mathrm{.}6114\mathrm{.}628$ years $36,000,000$

$37\mathrm{.}3113\mathrm{.}1715\mathrm{.}5$ years $56,000,000$

$46\mathrm{.}9102\mathrm{.}4125$ years $63,000,000$

If the corporate tax rate is $21$ percent, what is the aftertax cost of the company$$s debt? $($Do not round intermediate calculations and enter your answer as a percent rounded to $2$ decimal places, e$.$g$.,32\mathrm{.}16.)$