(Appendix 6B) Inventory Costing Methods: Periodic FIFO 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 FIFO inventory costing method. \begin{tabular}{lll} Cost of goods sold & $ & X \\ Cost of ending & $ & X \\ inventory & & \end{tabular}