Use the Following Data to Determine the Total Amount of Working

Use the following data to determine the total amount of working capital.
$\begin{array}{lc}\quad\quad\quad\quad\quad\quad\quad\quad\quad\quad\quad\quad\quad\quad\quad\quad\quad\quad\quad\quad\quad\quad\quad\quad& \text {Koonce Office Supplies } \\ & \text { Balance Sheet } \\ & \text { December 31, 2014 } \\ \end{array}$

$\begin{array}{lc}\text { Cash } & \$ & 130,000 & \text { Accounts payable } & \$ 140,000 \\\text { Accounts receivable } & & 100,000 & \text { Salaries and wages payable } & 20,000 \\\text { Inventory } & & 110,000 & \text { Mortgage payable } & \underline{\text{ 160,000 }} \\\text { Prepaid insurance} & & 60,000 & \text { Total liabilities } & \$320,000 \\\text { Stock investments} & & 170,000 & & \\\text { Land } & & 180,000 & & \\\text { Buildings } & \$210,000 & & \text { Common stock } & \$240,000 \\\text { Less: Accumulated} & & & \text { Retained earnings} & \underline{\text{ 500,000 }} \\\text { depreciation } & \underline{\text{ (40,000) }} & 170,000 & \text { Total stockholders' equity } & \underline{\$ 740,000} \\\text { Trademarks } & & \underline{\text{ 140,000 }} & \text { Total liabilities and} & \\\text { Total assets } & & \underline{\text{ \underline{\text{ \$1.060.000 }} }} & \text { stockholders' equity } & \underline{\text{ \underline{\text{ \$1.060.000 }} }} \\ \end{array}$

A) $240,000
B) $390,000
C) $130,000
D) $180,000