please help me understand how to do this

Question 4 of 12 - /1 E View Policies Current Attempt in Progress Oriole Company uses a periodic inventory system and reports the following for the month of June. Unit Cost $5 Date June 1 12 23 30 Explanation Inventory Purchase Purchase Inventory Units 130 400 210 212 Total Cost $ 650 2.400 1.470 6 7 (a) Compute the cost of the ending inventory and the cost of goods sold under FIFO, LIFO, and average-cost. (Round per unit cost to 3 decimal places, c.8. 15.647 and final answers to decimal places, e.8.5,125.) FIFO LIFO Average cost $ $ $ Cost of the ending inventory Cost of goods sold $ $ e Textbook and Media