Please me sure to answer questions in addition to filling in the table

Courtney Company uses a periodic inventory system. The following data were available: beginning inventory, 1,800 units at $40; purchases, 4,200 units at $42; operating expenses (excluding income taxes), $95,500; ending inventory per physical count at December 31, 1,150 units; sales price per unit, \$80; 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