ABC Co. has interest expense of $500, total revenues of $45,000, costs of $30,000, depreciation of $1000, and taxes of $2,000. The beginning balance sheet has total assets of $50,000, net fixed assets of $28,000, current liabilities of $14,000, and total liabilities of $5,000. The ending balance sheet shows total assets of $52,000, net fixed assets of $35,000, current liabilities of $18,000, and total liabilities of $10,000. What is the annual cash flow of the firm?