The following table tracks the main components of working capital over the life of a four-year project. Accounts receivable Inventory Accounts payable 2019 0 2020 166,000 2021 241,000 2022 2023 206,000 0 83,000 29,000 138,000 138,000 103,000 0 54,000 58,000 39,000 0 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.) 2019 2020 2021 Net working capital Cash flows 2022 2023