If product inventory will be tracked go to:
1. Settings, General, Modules, Inventory and the Inventory Tracking fields must be set to Enabled.
2. Go to Settings, Products & Services.
Click the blue icon to the left of the item you want to track inventory.
Scroll to the bottom of the page and select the Track Inventory check box then Save.
You will now have access to the inventory tab within the item.
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