Please review and let me know if I am approaching these correctly. Thanks in advance!

1. Determine cost of equity using CAPM.

Beta	1.69
Total Debt	$11,390,000,000
Shares Outstanding	327,250,000
price per share (adj. closed)	131.92
rM	0.076
Tax	0.021
rF	0.0078

A: Re = rf + Beta(rm -rf) = .0078 + 1.69(.076-.0078) = .12305800 = 12.3058%

2. Calculate the firms market value of its equity by multiplying the Shares Outstanding by the Adj Close historical price. Report these values with all their zeros (ex: 8.12B = 8120000000).

Shares Outstanding	327,250,000
price per share (adj. closed)	131.92
market value of its equity	$43,170,820,000.00

3. Calculate the firms value as the sum of the equity market value and the book value of debt (Total Debt from Yahoo! Finance). Report these values with all their zeros (ex: 8.12B = 8120000000).

Total Debt:	11,390,000,000
market value of its equity	$43,170,820,000.00
Firm Value	$31,780,820,000.00

I used Eq - Debt. Should it be Eq + Debt?

3. Using the cost of equity and cost of debt you determined above, calculate Marriotts WACC. Be sure to use market value of equity as the weight for equity and Total Debt as the weight for debt.

market value of its equity	$43,170,820,000.00	79.124214%
Total Debt:	$11,390,000,000.00	20.875786%

rd	3.7376178%
re	12.3058%

WACC = (wd * rd) + (we * re) + (wpref * rpref) = (3.7376178% * 20.875786%) + (12.3058% * 79.124214%) + (0 * 0) = 10.517125%