I have 7-5 done! Having issues with Ex 7-6!

EX 7-5 Perpetual inventory using LIFO 19 points Beginning inventory, purchases, and sales data for prepaid cell phones for May are as follows: Inventory Purchases Sales May 1 1,550 units at $44 May 10 720 units at $45 May 12 1,200 units 20 1,200 units at $48 14 830 units 31 1,000 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. b. Based upon the preceding data, would you expect the inventory to be higher or lower using the first-in, first-out method? EX 7-6 Perpetual inventory using FIFO 19 points Assume that the business in Exercise 7-5 maintains a perpetual inventory system, costing by the first-in, first-out 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 3