Sydney Corporation uses a PERIODIC inventory system, and provides the following information related to its inventory during the month of April 2022. Compute the number of units on hand at the end of the month. Required: 1. Determine the cost assigned to ending inventory and to cost of goods sold using the FIFO method. 2. Determine the cost assigned to ending inventory and to cost of goods sold using the LIFO method. 3. Determine the cost assigned to ending inventory and to cost of goods sold using the average cost method