Keep Expanded Promotional Data.
Use this Inventory option in Options Configuration to specify whether the system keeps detailed promotional sales history for each of the last thirteen periods. You can view the promotional sales history in Function ISH (Item Sales History). This field is used as the default for the Keep Promo History? field in the Inventory Maintenance window, the Codes tab.
This field is for Advanced Inventory users only.
The following options are available:
Y = Update Function ISH with expanded promotional sales history.
N = Do not update Function ISH with expanded promotional sales history.