Units 140 Riverside Ltd. uses a perpetual inventory system and had the following activity for a single inventory item: July 1, inventory Purchases: Unit Cost Total Cost $2.50 $350 July 5 200 3.50 700 July 10 140 4.50 630 July 15 160 5.50 880 Sales: July 11 250 July19 150 Instructions Using the perpetual system, determine the ending inventory and cost of goods sold under: a) FIFO b) Weighted-average (round unit cost to nearest cent) Show your work