Lach, Inc, has an operating cash flow of $50,000, cash flow to creditors of $20,000, depreciation expense of $3,000, and cash flow to a stockholders of $10,000 during 2010. If net fixed assets increased by $15,000 during 2010, what was the addition to net working capital or NWC?
1) $13,000
2) $35,000
3) $5,000
4) $2,000