In its first month of operations, Oriole Company made three purchases of merchandise in the following sequence: (1) 330 units at $8; (2) 490 units at $9, and (3) 200 units at $10 Assuming there are 420 units on hand, compute the cost of the ending inventory under the (a) FIFO method and (b) LiFO method, Oriole uses a periodic inventory system