Inventories, in millions Mar. 31, 2019 Dec. 31, 2018 Finished goods $5,703 $5,640 Work in process 2,239 2,214 Raw materials 940 941 Supplies 891 880 Total $9,773 $9,675 Adjustment of inventories to a LIFO basis (262) (415) Total inventories $9,508 $9,260 Required a. What inventory costing method does Dow Chemical use? | LIFO As of Q1 of 2019, what is the effect on cumulative pretax income and cash flow of using this inventory costing method, assuming a 30% average cumulative tax rate. Note: Do not use any negative signs with your answers. Effect on pretax income (in millions): $ 265 Reduction Effect on cash flows (in millions): $ 79.5 Increase What is the effect on Q1 of 2019 pretax income and cash flow of using this inventory costing method, assuming a 21% tax rate? Note: Do not use any negative signs with your answers. Effect on pretax income (in millions): $ 150 X Increase Effect on cash flows (in millions): $ 31.5 Reduction b. Compute inventory turnover and average inventory days outstanding for Q1 of 2019. (Hint: How do we adjust the ratio for the number of days in a quarter instead of a year?) Note: Do not round until your final answer; round your final answer to one decimal place (for example, enter 6.8 for 6.77555). Inventory turnover 1.1 times Average inventory days 79.8 x days