please help with each missing value

Perpetual Ifventory Using IfFO Beginning inventory, purchases, and sales data for prepaid cell phones for May are as follows: a. Assuming that the perpetual inventocy system is used, costing by the Lifo method, determine the cost of merchandise sold for each sale and the inventory balance after each sain, 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 coit first in the Cost of Marchandise Sold Unit Cost column and LOWER unit cost firat in the Inventory unit Cost column. b. Based upon the preceding data, would you expect the inventory to be higher or lower using the firstein, first-out method