Cash Accounts receivable Inventory Net fixed assets Total assets Balance Sheet 2014 2015 $ 1,300 $ 1,800 Accounts payable 17,400 15,800 Long-term debt 24,900 23,200 Common stock 87,500 89,700 Retained earnings $131,100 $130,500 Total liabilities and equity 2014 2015 $13,500 $ 16,900 38,500 47,000 18,000 21,000 61.100 45.600 $131.100 $130,500 Income Statement Net Sales $142,600 Costs 123,700 Depreciation 13,700 EBIT 5,200 Interest 2.900 Taxable income 2,300 Taxes 400 Net Income $ 1.900 What is the change in net working capital for 2015? Select one: a. -$600 O b. $6,200 C. -$6,200 d. $600