The 2013 income statement for Lou's Shoes shows that depreciation expense is $2 million, EBIT is $5 million, EBT is $3 million, and the tax rate is 40 percent. At the beginning of the year, the balance of gross fixed assets was $16 million and net operating working capital was $6 million. At the end of the year gross fixed assets was $20 million. Lou's free cash flow for the year was $4 million. What is their end of year balance for net operating working capital?