How do you calculate Free Cash Flow for the following data

Kyter Exercise Equipment Inc. Statement of Cash Flows Year Ended December 31. 2015 Cash Flows From Operating Activities: Net Income Adjustment to Reconcile Net Income to Net Cash Provided by (Used for) Operating Activities: Depreciation Expense Increase in Accounts Receivable Decrease in Merchandise Inventory Increase in Accounts Payable Decrease in Salaries Payable Net Cash Proved by (Used for) Operating Activities Cash Flows From Investing Activities: Cash Payment for Acquisition of Plant Assets Cash Payment for Investments Net Cash Provided by (Used for) Investing Activities Cash FLOWS FROM Fencing Activities Cash Payment of Dividends Cash Payment of Notes Payable Cash Receipt from Issuance of Common Stock Net Cash Provided by (Used for) Financing Activities Net Increase (Decrease) in Cash Cash Balance, December 31. 2014 Cash Balance. December 31.2015