(Appendix 6B) Inventory Costing Methods: Periodic Average Cost Filimonov Inc. has the following information related to purchases and sales of one of its inventory items: sssume tnat rilimonov uses a perioaic inventory system.| Required: CostofgoodssoldCostofendinginventory4sXX Fenoblack Theck My Work For cost of goods sold and cost of ending inventory using the average cost method, apply the following steps: Step 1: Calculate the cost of goods available for sale for the period. available for sale + units available for sale)