Quick Computing currently sells $14$ million computer chips each year at a price of $$17$ per chip. It is about to introduce a new chip, and it forecasts annual sales of $24$ million of these improved chips at a price of $$21$ each. However, demand for the old chip will decrease, and sales of the old chip are expected to fall to $6$ million per year. The old chips cost $$9$ each to manufacture, and the new ones will cost $$12$ each. What is the proper cash flow to use to evaluate the present value of the introduction of the new chip?