Units Unit Cost Inventory, December 31, prior year For the current year: Purchase, April 11 Purchase, June 1 2,990 $ 12 8,840 13 7,970 18 Sales ($58 each) 10,830 Operating expenses (excluding income tax expense) $ 188,000 Required: 1. Prepare a separate income statement through pretax income that details cost of goods sold for (a) Case A: FIFO and (b) Case B: LIFO. 2. Compute the difference between the pretax income and the ending inventory amount for the two cases. 3. Which inventory costing method may be preferred for income tax purposes? Complete this question by entering your answers in the tabs below. ces Required 1 Required 2 Required 3 Compute the difference between the pretax income and the ending inventory amount for the two cases. Note: Loss amounts should be indicated with a minus sign. Comparison of Amounts Pretax income Ending inventory Case A FIFO Case B LIFO Difference