Penang Company sells many products. Below is an analysis of the inventory purchases and sales for the month of August 2022 Required: (a) Calculate Cost of goods sold (COGS) and Ending Inventory using perpertual system under: 1. FIFO method 2. Weighted Average cost method. (b) Calculate Cost of goods sold (COGS) and Ending Inventory using periodic system under: 3. FIFO method 4. Weighted Average cost method