The Total Sold field displays the quantity of the item that has been sold on Sales Invoices. This field is not updated by Sales Orders.
This field is sometimes set to zero at the end of each year using the Search & Replace function, enabling it to represent Total Sold for the current year only.
Note: The Total Sold quantity for any time frame may always be calculated using the Ssales Analysis and/or History reports from the Inventory menu in the Report Manager. These reports obtain values from the Sales Transaction records and do not reflect editing of the Total Sold field.
See:
Inventory Database - Main Screen Fields