Exterra Communications reported the following financial statements for 2021: EXTERRA COMMUNICATIONS Income Statement Year ended June 30, 2021 Sales revenue Cost of goods sold Depreciation expense Salary expense Other expenses, including income taxes Total expenses Net income $660 $340 40 50 150 580 $ 80 EXTERRA COMMUNICATIONS Comparative Balance Sheet June 30, 2021 and 2020 2021 2020 2021 2020 Thousands Assets Current: Cash Accounts receivable Inventory Prepaid expenses Long-term investments Plant assets, net Liabilities Current: Accounts payable Salary payable Accrued liabilities Long-term notes payable $ 41 22 84 $ 39 $ 17 54 47 80 3 2 90 215 185 $ 53 25 6 63 11 68 85 Stockholders' Equity Common stock Retained earnings Total 40 289 $476 37 246 $425 Total $476 $425 Additional data during 2021: Exterra purchased no investments, but sold one investment. Exterra sold no plant assets, but purchased plant assets. Exterra had only one long-term note payable transaction. Exterra had only one common stock transactions. Prepare Exterra Communications' statement of cash flows for the year ended June 30, 2021