In its first month of operations, Giffin Company made three purchases of merchandise in the following sequence: (1) 310 units at $8, (2) 410 units at $10, and (3) 510 units at $11. Assuming there are 210 units on hand at the end of the period, compute the cost of the ending inventory under (a) the FIFO method and (b) the LIFO method. Giffin uses a periodic inventory system