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4 (10pt) Ecology group wishes to purchase a piece of equipment for recycling of various metals. Machine 1 costs $800000, has a life of 10 years, an annual cost of $80000, and requires one operator at a cost of $192 per hour. It can process 10 tons per hour. Machine 2 costs $480000, has a life of 6 years, an annual cost of $40000, and requires two operators at a cost of $192 per hour each to process 6 tons per hour. Determine the annual breakeven tonnage of scrap metal at i-10% per year