I need help in these 3 questions. Please make sure there is no plagiarism. Answer these 3 questions carefully and correct

Q4. Explain the purpose and the importance of the income statement, and prepare the income statement for ABC company based on the following information taken from the trial balance in 2021 (4 Marks) Q5. On October 1, Saad Co. sold merchandise in the amount of SAR 5,800 to Neom Co., with credit terms of 2/10,n/30. The cost of the items sold is SAR 4,000. Saad Co. uses the perpetual inventory system. On October 4, Neom Co. returns some of the merchandise. The selling price of the merchandise is SAR1,500, and the cost of the merchandise returned is SAR 1,050. Record the entry or entries that Saad Co. must make on October4th. a. Explain in your own words four costing methods of inventory with a numerical example for each b. A company that uses a perpetual inventory system made the following cash purchases and sales. There was no beginning inventory. Prepare general journal entries to record the March 16 sale using the FIFO inventory valuation method and the LIFO inventory valuation method