Eric has another$$ get$-$rich$-$quick idea, but needs funding to support it$.$ He chooses an$$ all$-$debt funding scenario. He will borrow $$$$1,802$ from$$ Wendy, who will charge him $7\%$ on the loan. He will also borrow $$$$1,550$ from$$ Bebe, who will charge him $9\%$ on the$$ loan, and $$$$648$ from$$ Shelly, who will charge him $15\%$ on the loan. What is the weighted average cost of capital for$$ Eric?