Recent technology has made possible a com- puterized vending machine that can grind cof- fee beans and brew fresh coffee on demand. The computer also makes possible such com- plicated functions as changing $5 and $10 bills and tracking the age of an item and then mov- ing the oldest stock to the front of the line, thus cutting down on spoilage. With a price tag of $4,500 for each unit. Easy Snack has estimated the cash flows in millions of dollars over the product's six-year useful life, including the ini- tial investment, as follows: