Please use the following balance sheets and income statements to solve this problem (all numbers in Million USD)

Ariba Company	2018	2017	Net Sales and Revenues	2018	2017
Cash and cash equivalents	$3,000.	$ 3,000.	Net Sales	26,000.	28,000.
Marketable securities	$ 350.	$ 230.	Cost of sales	18,000.	20,000.
Account receivables	$25,000	$28,000.	Research and dev expenses	1,000.	1,000.
Other receivables	$1,000.	$ 900.	Selling expenses	2,000.	2,000.
Inventories	$ 3,000.	$ 3,000.0	Interest expense	760.	680.
Prepaid expenses	$ 5,000.	$ 4,000.	Non-operating expenses	1000.	960.
Property & equipment - net	$11,000.	$10,000.	Total	24,000	26,000.
Goodwill	$ 800.7	$ 700.0	Income before Income Taxes	2,000.	2,000.
Intangible assets - net	$ 4,000.1	$ 4,000.	Provision for income taxes	700.	800.
Total Assets	$57,000.	$57,000.	Income of Consolidated Group	1,000.	1,00.
LIABILITIES
Short-term borrowings	$6,000.2	$ 8,000.
Account payables	$5,000.1	$ 4,000.
Accrued expenses	7,000.1	$ 7,000.
Deferred revenues	$ 160.0	$ 160
Long-term borrowings	$21,000.	$23,000.
Other liabilities	$ 8,000.5	$ 6,000.
Total liabilities	$50,000.	$51,000.
STOCKHOLDERS' EQUITY
Common stock	$2,000.	$ 2,000
Treasury stock	(15,000.)	(15,000.)
Retained earnings	$23,000.	$23,000.
Comprehensive income/loss	(5,000.0)	(4,000)
Total stockholders' equity	$ 6,000	$ 6,000

Calculate Aribas Free Cash Flow during 2018 and explain the meaning of the free cash flow you have calculated to Aribias investors.