Question 6-1/Ex. 215/ The following information is available for Massey Company: Beginning inventory First purchase Second purchase 600 units at $5 900 units at $6 500 units at $7 Assume that Massey uses a periodic inventory system and that there are 700 units left at the end of the month. Total sales amounted to $30,000 Instructions Compute the cost of ending inventory and cost of goods sold under the (a) FIFO method. (b) Average-cost method. (c) Journalize sale of inventory on account (use FIFO for CGS) .