Answer and Explanation:
cash flow from operating activities
amount
net income $280,000
non cash expenditure:
depreciation $48,000
non operating gains:
loss on disposal of equipment $18,520
cash flow before working capital changes $347,520
working capital changes:
increase in accounts receivable ($17,280)
increase in accounts payable $8,960 ($8,320)
cash flow from operating activities $339,200