Givoly Inc. uses a periodic inventory system. At the end of the annual accounting period, December 31 of the current year, the accounting records provided the following information for product 2: Units 6,800 Unit Cost $ 8 Inventory, December 31, prior year For the current year: Purchase, March 5 Purchase, September 19 Sale ($30 each) Sale ($32 each) Operating expenses (excluding income tax expense) 18,800 9,800 8,000 15,800 $398,000 2. Compute the difference between the pretax income and the ending inventory amounts for the two cases. Comparison of Amounts Case A Case B FIFO LIFO Difference Pretax income Ending inventory Which inventory costing method may be preferred for income tax purposes