The following table tracks the main components of working capital over the life of a four-year project. 2017 2018 2019 2020 Inventory Accounts payable 0 166,000 241,000 206,000 83,000 138,000 138,000 103,000 29,000 54,000 58,000 39,000 Calculate net working capital and the cash inflows and outflows due to investment in working capital. (Negative answers should be indicated by a minus sign. Leave no cells blank - be certain to enter "O wherever required.) 2016 2017 2018 2019 2020 Net working capital Cash flows