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A firm is considering a project that requires 10% of sales for investment in net working capital. If the firm's revenues for year 1 are $200,000, for year 2$300,000 and for year 3 $450,000, what are the amounts of NWC for each of three years that should be considered part of the cash flows for the project. 20,000;30,000;45,000 20,000;40,000;60,000 20,000;10,000;15,000 None of the above