Le Son, Inc., has current liabilities of $11,700 and accounts receivables of $15,200. The firm has total assets of $43,400 and net fixed assets of $24,800. The owners' equity has a book value of $21,000. What is the amount of the net working capital?

a. <$8,300>

b. <$3,800>

c. $3,500

d. $6,900

e. $10,700