In its first month of operations, McLanie Company made three purchases of merchandise in the following sequence: $(1)300$ units at $$6,(2)400$ units at $$8,$ and $(3)500$ units at $$9.$

Assuming there are $200$ units on hand, compute the cost of the ending inventory under the $($a$)$ FIFO method and $($b$)$ LIFO method. McLanie uses a periodic inventory system.

$($a$)$ Cost of the ending inventory $

$($b$)$ Cost of the ending inventory $