Milton Enterprises had cash flows for the year as follows ($ in millions): CASH RECEIVED FROM: Customers $ 1,800 Interest on investments 200 Sale of land 100 Sale of common stock 600 Issuance of debt securities 2.000 CASH PAID FOR: Interest on debt $ 300 Income tax 80 Debt principal reduction 1,500 Purchase of equipment 4.000 Income tax 80 Debt principal reduction 1,500 Purchase of equipment 4,000 Purchase of inventory 1.000 Dividends on common stock 200 Operating expenses 500 Milton Enterprises would report net cash inflows (outflows) from investing activities in the amount of: $ million