You may want to allow editing of item statistics, including sales and return quantities and amounts, while you are setting up your Inventory Control system, particularly if you are creating the system partway through an accounting year. You can then enter more complete inventory records by adding the statistics from your previous system for previous periods in the current year, and for previous years.
To allow editing of sales and transactions statistics:
Inventory Control > I/C Setup > Options.
After you finish setting up your Inventory Control system and your system is operating, you can turn off the Allow Edit Of Statistics option because the program automatically updates the statistics when you post transactions.