In the periodic inventory system, all the purchases made
between physical inventory counts are recorded in the purchases
account.
When the physical inventory count is done, the stocks in the
purchases account is shifted to the inventory account which in turn
is adjusted to match with the cost of inventory at the end.
Some advantages of periodic inventory system is reduced setup
costs and an informed forecasting.
Periodic inventory system includes accounting for opening
inventory and all purchases as credits.
Companies do not account for their sales but do a physical
count of inventory at the end and adjust the ending inventory
according to the physical count.