In its first month of operations, Concord Company made three purchases of merchandise in the following sequence: (1) 320 units at $7, (2) 450 units at $8, and (3) 210 units at $9. Assuming there are 390 units on hand, compute the cost of the ending inventory under the (a) FIFO method and (b) LIFO method. Concord uses a periodic inventory system. FIFO LIFO Cost of the ending inventory $ $ $