Hi Andre,
The periods in IC Sales History are not fiscal periods, and are not connected to GL in any way. They are how often you run Period End in Inventory, based on the period end dates you see in the IC company profile. If you view an item (with sales and costs) and look at the Sales History tab, you will see these statistical amounts. Period 2 is 2 periods ago. Period 8 is 8 periods ago.
It doesn't matter what you set as the Fiscal Period in GridView, this will have zero affect on the Item Sales History period selection. Same with the Run Date - zero influence. This is because the Sales History amounts are not calculated based on date but are simply stored amounts on the item master record. If you indeed wanted date-sensitive reports, you should be doing this on the Transaction History table, not the Items (1) table.
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Regards,
Softrak Tech Support