Perpetual Inventory Using LIFO Beginning inventory, purchases, and sales data for prepaid cell phones for May are as follows: Inventory May 1 Purchases Sales 1,800 units at $27 May 10 900 units at $29 May 12 1,260 units 20 810 units at $31 14 1,080 units 31 540 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 Quantity Date Purchased May 1 Purchases Purchases Quantity Unit Cost Total Cost Sold May 10 May 12 May 14 May 20 Cost of Cost of Merchandise Merchandise Sold Unit Cost Sold Total Cost Inventory Inventory Inventory Quantity Unit Cost Total Cost 00000001 May 31 May 31 Balances b. Based upon the preceding data, would you expect the inventory to be higher or lower using the first-in, first-out method?