(Appendix 6B) Inventory Costing Methods: Periodic LIFO Filimonov Inc. has the following information related to purchases and sales of one of its inventory items: Assume that Filimonov uses a periodic inventory system. Required: Calculate the cost of goods sold and the cost of ending inventory using the LIFO inventory costing method. Cost of goods sold Cost of ending \begin{tabular}{ll} $ & x \\ $ & x \end{tabular} inventory