6. Jackson & Sons uses packing machines to prepare its products for shipping. One machine costs $850,000 and lasts about 3 years before it needs replaced. The annual operating cash flow per machine is $-10,000. What is the equivalent annual cost of one packing machine if the required rate of return is 9%? (Round your answer to whole dollars.) $325,797 b. $340,002 $345,797 $347,648 $351,619 . . d