Use of Periodic Statistics in the Stock Inventory Section?

The effect of the "Use Periodic Statistics" option in the "Pricing" tab in the "Stock inventory" is as follows;


For example; You need to take an inventory according to "Weighted Average Purchase Price" in "Stock Inventory". Buying records for the product are as follows,



Product A - 01.01.2013 - Purchase Invoice

Product A - 05.01.2013 - Purchase Invoice

Product A - 10.01.2013 - Purchase Invoice



Sales records for the above purchase records are as follows:;

Product A - 08.01.2013 - Sales Invoice



When "Use Periodic Statistics" option is selected; Calculation is made based on the purchasing movements of product A until the date of sale. As seen in the example, the transactions between 01.01.2013 and 05.01.2013 will be included in the calculation.



When the "Use Periodic Statistics "option is not selected; Calculation is made based on all purchasing transactions of product A. As seen in the example, the transaction on 01.01.2013, 05.01.2013 and 10.01.2013 will be included in the calculation.