Great Lakes Packing has two bond issues outstanding. The first issue has a coupon rate of $3\mathrm{.}76$ percent, a par value of $$1,000$ per bond, matures in $3$ years, has a total face value of $$4\mathrm{.}9$ million, and is quoted at $108$ percent of face value. The second issue has a coupon rate of $6\mathrm{.}53$ percent, a par value of $$1,000$ per bond, matures in $17$ years, has a total face value of $$9\mathrm{.}2$ million, and is quoted at $105$ percent of face value. Both bonds pay interest semiannually. The company's tax rate is $35$ percent. What is the firm's weighted average aftertax cost of debt?