Does anyone know how to calculate the operating cash flow using the attached balance sheet and income statement?

15 12 407 16 5. Calculate the operating cash flow using the following balance sheet and income statement: Balance Sheet 2016 2015 Cash 25 290 240 Inventory 80 175 Prepaid Expenses 6 Total Current assets 436 PPE 710 470 Less Accum Depreciation -100 -85 Net PPE 610 385 Long tem investments 19 Total Assets 1017 840 AP 254 230 Accrued 189 72 Income Tax payable 12 Total current liabilities 455 Bonds Payable 245 Total Liabilities 700 Common Stock Retained earnings 107 74 Total Stockholders equity 317 324 Total Liabilities and SE 1017 840 336 180 516 250 210 Income Statement Sales Cost of goods sold Gross margin Selling and administrative expenses Net operating income 750 250 500 365 135 Income Taxes Net Income 32 103