Hilton Corporation has 1 million shares of common stock outstanding and 80,000 bonds with 6% coupon at $1000 par each. The stock currently sells at $53 per share and has a beta of 1.15; the bonds have 25 years to maturity and sell at $1141. The market risk premium is 6.8% and Treasury bills are yielding 3.1%. If Hiltons corporate tax rate is 21%, what is the companys cost of capital (WACC)?