The M&R firm uses perpetual inventory system to account for acquisition and sale of inventory and (FIFO or WA) methods to compute cost of goods sold and for the valuation of ending inventory. The company has made the following purchases and sales during the month of May 2022. May. 01: Inventory at the beginning of the month; 12 units SAR500 per unit. May. 05: Sales: 8 units SAR 800 per unit. May. 06: Purchases; 6 units SAR510 per unit. May. 11: Purchases; 5 units SAR525 per unit. May. 12: Sales; 8 units SAR 800 per unit May. 21: Sales; 6 units SAR 800 per unit May. 25: Purchases; 6 units SAR530 per unit. May. 26: Purchases; 2 units SAR540 per unit. May. 29: Sales; 3 units SAR 800 per unit. (SAR means: Saudi Arabian Riyal) Required: Prepare journal entries to record the above transactions under perpetual inventory system. Prepare a FIFO perpetual inventory account. Prepare a WA perpetual inventory account.