Free Cash Flow and Present Value of Future Cash Flow Questions

Hello. I have another question on my readings from the Dhandho Investor by Pabrai. He analyzed Bed Bath and Beyond's stock. My only question is how he got the number 523 for Free Cash Flow

Information (For 2005)
Quoted Stock Price = $36 per share
Market Cap = $10,700,000,000

Capital Expenditures = $191,000,000
Depreciation = $99,000,000
Net Free Cash Flow = $413,000,000

Revenue Growth = 15% to 20%
Net Income Growth= 25% to 30%

Growth for Free Cash Flow = 30% for first 3 years, then 15% a year for three years, 10% a year thereafter

Excess Cash = $850,000,000
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Please see the excel doc for the chart



Best regards,

James