Use these financial statements to answer the question.

Income Statement
Net Sales ............$32,700
Costs ............... 20,705
Depreciation ............ 2,510
EBIT ............... 9,485
Interest .............. 1,000
Taxable income ......... 8,485
Taxes .............. 2,885
Net Income ............ $5,600
Use the attached financial statements to answer the below question.
What is the change in net working capital between 2006 and 2007?

a. 300 

b. 900 

c. 8600 

d. 9500

Balance Sheet 2006 2007 S 5,300 S 4,700 12,800 9,400 7,500 10,000 5,900 9,200 S31,500 S33,300 Total liabilities and equity S31,500 S33,300 2006 2007 S 1,400 S 2,300 Accounts payable Cash Accounts receivable 4,100 4300 Long-term debt Inventory Net fixed assets Total assets 8,400 7,600 Common stock 17,600 19,100 Retained eanings