Perpetual Inventory Using LIFO Beginning inventory, purchases, and sales data for prepaid cell phones for May are as follows: Inventory May 1 2,800 units at $35 Purchases May 10 Sales 20 1,400 units at $37 1,260 units at $39 14 31 May 12 1,960 units 1,680 units 840 units a. Assuming that the perpetual inventory system is used, costing by the LIFO method, determine the cost of merchandise sold for each sale and the inventory balance after each sale, presenting the data in the form illustrated in Exhibit 4. Under LIFO, if units are in inventory at two different costs, enter the units with the HIGHER unit cost first in the Cost of Merchandise Sold Unit Cost column and LOWER unit cost first in the Inventory Unit Cost column. Schedule of Cost of Merchandise Sold LIFO Method Prepaid Cell Phones Cost of Cost of Quantity Purchases Purchases Quantity Unit Cost Total Cost Merchandise Merchandise Sold Sold Unit Cost Total Cost Sold Date Purchased May 1 Inventory Inventory Inventory Quantity Unit Cost Total Cost May 10 May 12 May 14 May 20 May 31 May 31 Balances 88 b. Based upon the preceding data, would you expect the inventory to be higher or lower using the first-in, first-out method