The 2020 income statement for ABC Inc. shows that depreciation expense is $900, EBIT is $2100, EBT is $1200, and the tax rate is 30 percent. At the beginning of the year, the balance of gross fixed assets was $7500 and net operating working capital was $2500. At the end of the year gross fixed assets was $9015. ABC's free cash flow for the year was $2125. Calculate the end of year balance for net operating working capital