EX7-9 Weighted average cost flow method under perpetual inventory system OBJ. 3 The following units of a particular item were available for sale during the calendar year: Jan. 1 Inventory Apr. 19 Sale June 30 Sept. 2 Sale Nov. 15 4,000 units at $20 2,500 units 6,000 units at $24 4,500 units 1,000 units at $25 Purchase Purchase firm uses the weighted average cost method with a perpetual inventory system. Determine the cost of merchandise sold for each sale and the inventory balance after each sale. Present the data in the form illustrated in Exhibit 5 EX 7-10 Perpetual inventory using FIFO OBJ. 3 at the business in Exercise 7-9 maintains a perpetual inventory system. Deter mine the cost of merchandise sold for each sale and the inventory balance after each sale assuming the first-in, first-out method. Present the data in the form illustrated in Exhibit 3. Perpetual inventory using LIFO EX 7-11 Assum OBJ. 3 e that the business in Exercise 7-9 maintains a perpetual inventory system. Deter- e the cost of merchandise sold for each sale and the inventory balance after each sale, assuming the last-in, first-out method. Present the data in the form illustrated in Exhibit 4