Step-by-step explanation:
(a) FIFO
In using this method we calculate cost based on the price of the earliest (first) purchased inventory date.
(b) LIFO
Here we calculate cost by using the price of the most recent (last) purchased inventory date. eg for inventory cost calulations for March 9 we use the price value of March 29
(c) weighted average
This meeting uses the average cost of the entire inventory in the month. Calculated by dividing total cost by today inventory.
(d) specific identification.
Here cost are just assigned to each individual item or batch of items in the period.