Manage Quantities
When you create or edit items for your eStore, you determine whether to manage the quantity of the item, whether to publicize the amount available, and whether to receive notifications when the item is sold out. Whenever the item is purchased, the available quantity automatically decreases. For more information, refer to Create items.
Note: If you allow the donor to specify the donation amount for an item, you can't manage quantity for that item.
After you save the initial quantity, you can return to the item page to update the quantity. For example, if you receive a another shipment of coffee mugs, move a class to a larger room, or give away t-shirts at a conference, you may need to manually update the amount of "item" available. From the item page, click Manage. Select whether to increase or decrease the quantity and enter the amount by which to add or subtract. Then enter a description to explain the change and click Save and. The quantity is updated and information about the change appears in the Manual Change History for future reference.
To report on the quantity of items available, run the Cart Items - Quantity Remaining standard report.