Express Distribution markets CDs of the performing artist Fishe. At the beginning of October, Express had in beginning inventory 2000 of Fishe's CDs with a unit cost of $7. During October, Express made the following purchases of Fishe's CDs. Oct. 3 3,000 units @ $8 Oct. 9 3,500 units @ $9 Oct. 193,500 units @ $10 Oct. 25 5,000 units @ $12 On October 28, 11,500 units were sold. Express Distribution uses a perpetual inventory system. Instructions: a. Determine (1) the ending inventory on October 31 and (2) the cost of goods sold for the October 28 sale under the assumed cost flow method first-in first-out FIFO. b. Determine (1) the ending inventory on October 31 and (2) the cost of goods sold for the October 28 sale under the assumed cost flow method last-in first- out LIFO. c. Determine (1) the ending inventory on October 31 and (2) the cost of goods sold for the October 28 sale under the assumed cost flow method weighted average cost