A firm has $76,000,000 in debt, which accounts for 43% of their total funds raised; the after-tax cost of these funds is 6.10%. The same firm has $100 million in common stock, which accounts for 57% of their total funds raised; their after-tax costs (including transaction costs) are 15.7%. What is the weighted average cost of capital for these funds?

10.21%
8.92%
2.63%
11.55%