2-37 Flow of Inventoriable Costs. Stewart Tables' selected data for March 2020 are presented here (in millions): Direct materials inventory, March 1, 2020 $ 90 Direct materials purchased 345 Direct materials used 365 Total manufacturing overhead costs 485 Variable manufacturing overhead costs 270 Total manufacturing costs incurred during March 2020 1,570 Work-in-process inventory, March 1, 2020 215 Cost of goods manufactured 1,640 Finished-goods inventory, March 1, 2020 Cost of goods sold 160 1,740 Calculate the following costs: 1. Direct materials inventory, March 31, 2020 2. Fixed manufacturing overhead costs for March 2020 3. Direct manufacturing labor costs for March 2020 4. Work-in-process inventory, March 31, 2020 5. Cost of finished goods available for sale in March 2020 6. Finished goods inventory, March 31, 2020