Roadrunner Beepers has three existing bonds as part of its debt portfolio. Bond A has a return of 4.30% at current market price. Bond B has a 6.64% return, and Bond C has an 8.57% return (all rates are before the 21% tax adjustment). If bond A holds 23% of the portfolio, bond B holds 47%, and bond C holds 30%, what is the weighted average cost of debt capital? 6.796 7.05% O 8.17% 0 7.52% 5.28%