The 2015 income statement for Duffy’s Pest Control shows that depreciation expense was $205 million, EBIT was $520 million, and the tax rate was 30 percent. At the beginning of the year, the balance of gross fixed assets was $1,590 million and net operating working capital was $425 million. At the end of the year, gross fixed assets were $1,845 million. Duffy’s free cash flow for the year was $433 million. Calculate the end-of-year balance for net operating working capital.