Brief Exercise 6-41 Inventory Costing Methods: Periodic Inventory Systems. (Appendix 6B) Tyler Company has the following information related to purchases and sales of one of its inventory items. Assume that the company uses the periodic inventory system. Required: Calculate the cost of goods sold and the cost of ending inventory using the FIFO, LIFO, and average cost methods. (Note: Use four decimal places for perunit calculations and round all other numbers to the nearest whole dollar.)