In its first month of operations, Waterway Company made three purchases of merchandise in the following sequence: (1) 340 units at $6, (2) 450 units at $7, and (3) 250 units at $8. Assuming there are 420 units on hand, compute the cost of the ending inventory under the (a) FIFO method and (b) LIFO method. Waterway uses a periodic inventory system. Cost of the ending inventory $ EA FIFO +A LIFO