The DJ company uses a periodic inventory system. The beginning balance of inventory and purchases made by the company during December 2020 are given below. ---------------- December 01: Beginning inventory, 50 units @ Rs40 per unit. December 18: Inventory purchased, 60 units @ Rs48 per unit. December 20: Inventory purchased, 20 units @ Rs 52 per unit. December 25: Inventory purchased, 70 units @ Rs56 per unit. The DJ company sold 160 units during December 2020. Required: Compute inventory on December 31, 2020, and cost of goods sold for December using the following inventory costing method: Last in, first-out (LIFO) method. Average cost method.