Use the following data to determine the total amount of working capital from the Banner Auto Supplies Balance Sheet for December 31, 2020:

Cash $70,000
Accounts payable $130,000
Accounts receivable 100,000
Salaries and wages payable 20,000
Inventory 140,000
Mortgage payable 180,000
Prepaid insurance 80,000
Total liabilities $330,000
Stock investments 180,000
Land 190,000
Buildings $230,000
Common stock $240,000
Accumulated depreciation (60,000)
Retained earnings 500,000
Total stockholders' equity $740,000
Trademarks 140,000
Total assets $1,070,000
Total liabilities and stockholders' equity $1,070,000

a. 260,000
b. 240,000
c. 160,000
d. 420,000