Hi can you help me with these two?

BE6-3 In its first month of operations, Weatherall Company made three purchases of merchandise in the following sequence: (1) 300 units at $6, (2) 400 units at $7, and (3) 200 units at $8. Assuming there are 380 units on hand, compute the cost of the ending inventory under the (a) FIFO method and (b) LIFO method. Weatherall uses a periodic inventory system. BE6-4 Data for Weatherall Company are presented in BE6-3. Compute the cost of the ending inventory under the average-cost method, assuming there are 380 units on hand