From the figures mentioned below of Umbrella Corp, calculate the Weighted Average Cost of Capital (WACC).

Interest expenses $443 million

Corporate tax rate 30%

Default spread 1.56%

Market Value of short term debt $885 million

Market Value of long term debt $9,552 million

Market value of operating liabilities $1200 million

Total asset of firm $18,349 million

Systematic risk 0.79

Market value of equity $21,129 million

Risk free rate 1.7%

Market risk premium 4.72%