Montana Corp. is preparing its statement of cash flows. During the period, Montana sold a machine for $20,000. The machine had an original purchase price of $50,000 and a book value at the time of the sale of $40,000. How would this sale appear on the statement of cash flows? operating cash inflow of $20,000 operating cash outflow of $30,000 investing cash inflow of $20,000 investing cash inflow of $30,000