The formula is:

WACC = E/V * Re + D/V * Rd * (1 - TC)

Where:
Re = cost of equity
Rd = cost of debt
E = market value of the firm's equity
D = market value of the firm's debt
V = E + D
E/V = percentage of financing that is equity
D/V = percentage of financing that is debt
Tc = corporate tax rate

This is the information i have from the balance sheet and income statement for the company (EXXON MOBIL CORP) that i need to calculate the WACC for:

Corporate Tax Rate TC: 42.93%
Total Debt D: 16,678,500,000
Total Equity E: 327,720,000,000
Total Firm Value V: 344,398,500,000
Cost of Equity rE: 7%

This is my formula to work out WACC:

WACC = 327/344 * 7.00% + 16/344 * 4.04% * (1 - 42.93%)
- This equals 0.0676130828
So then I times it by 100 to get my WACC percentage rate
0.0676130828 x 100 = 6.76130828
Rounded off to 6.77% <== IS THAT THE WACC RATE?

Have I got the right Idea?

Any help would be greatly appreciated!!! Thank you!