E7-10 (Algo) Evaluating the Effects of Inventory Methods on Income from Operations, Income Taxes, and Net Income (Periodic) [LO 7-3] Courtney Company uses a periodic inventory system. The following data were available: beginning inventory, 1,500 units at $30; purchases, 4,500 units at $40; operating expenses (excluding income taxes), $99,000; ending inventory per physical count at December 31, 1,300 units; sales price per unit, $70; and average income tax rate, 30%. Required: 1. Complete the income statements and the cost of goods sold calculation under the FIFO, LIFO, and weighted average costing methods. 2-a. Between FIFO and LIFO, which method is preferable in terms of maximizing income from operations, if costs are rising? 2-b. Between FIFO and LIFO, which method is preferable in terms of minimizing income taxes, if costs are rising? 3-a. Between FIFO and LIFO, which method is preferable in terms of maximizing income from operations, if costs are falling? 3-b. Between FIFO and LIFO, which method is preferable in terms of minimizing income taxes, if costs are falling