A firm's balance sheets for year-end 2021 and 2022 contain the following data. All items are in millions of dollars. What happened to investment in net working capital during 2022? Note: Enter your answer in millions. A firm's balance sheets for year-end 2021 and 2022 contain the following data. All items are in millions of dollars. What happened to investment in net working capital during 2022? Note: Enter your answer in millions