Riverbed Limited uses a perpetual inventory system. The inventory records show the following data for its first month of operations: Date Aug Unit Cost $68 103 Total Cost $17,136 53,354 2 3 10 15 Explanation Purchases Purchases Sales Purchases Sales Units 252 518 (320) 936 (314) Balance in Units 252 770 450 1.386 1.072 125 117,000 25 (a) Calculate the cost of goods sold and ending inventory using the FIFO cost method Cost of goods sold 5 Ending inventory $