E7-8 Analyzing and interpreting the financial statment effects of periodic FICO, LIFO and weighted average cost

I just need questions 3-6. Thank you!

E7-8 Analyzing and Interpreting the Financial Statement Effects of Periodic FIFO, LIFO, and Weighted Average Cost LO 7.3 Orion Iron Corp, tracks the number of units purchased and sold throughout each year but applies its inventory costing method at the end of the year, as if it uses a periodic inventory system. Assume its accounting records provided the following information at the end of the annual accounting period, December 31 . Required: 1. Calculate the number and cost of goods available for sale. 2. Calculate the number of units in ending inventory. 3. Compute the cost of ending inventory and cost of goods sold under (a) FIFO, (b) LIFO, and (c) weighted average cost. 4. Prepare an income statement that shows the FIFO method in one column, the LIFO method in another column, and the weighted average method in a final column. Include the following line items in the income statement Sales, Cost of Goods Sold, Gross Protit, Operating Expenses, and Income from Operations. 5. Compare the Income from Operations and the ending inventory amounts that would be reported under the three methods. Explain the similarities and differences. 6. Which inventory costing method minimizes income taxes