EX 6-9 Weighted average cost flow method under perpetual inventory system Obj. 3 Total Cost of goods The following units of a particular item were available sold, $154,400 Jan. 1 Apr. 19 June 30 Sept. 2 Nov. 15 Inventory Sale Purchase Sale Purchase 4,000 units at $20 2,500 units 6,000 units at $24 4,500 units 1,000 units at $25 The firm uses the weighted average cost method with a perpetual inventory system. Determine the cost of goods sold for each sale and the inventory balance after each sale. Pres- ent the data in the form illustrated in Exhibit 5