unlocking estimated unit cost on negative inventory adjustment

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****** Disclaimer: This response was generated by an artificial intelligence assistant based on previous conversations from multiple Slack channels, and may contain inaccuracies or mistakes. ****** In NetSuite, when making an inventory adjustment, the estimated unit cost can only be edited for positive adjustments. For negative adjustments, the system uses the item's average cost. This is because the system assumes that you are removing items from your inventory, and it calculates the cost of the items being removed based on the average cost. If you're seeing a unit cost of 0.00 for a negative adjustment, it could be because the item was initially added via an inventory adjustment at 0.00 or received on a Purchase Order at 0.00. When increasing the stock level, particularly if the system on-hand stock was zero, you should enter the cost of each item being added to the quantity on hand in the Est. Unit Cost field. If you entered a negative number in the Adjust Qty By field, you cannot enter anything in this field. If you're dealing with a lot of negative inventory that needs adjustment, you might want to consider enabling the 'Prevent Negative Inventory' preference in NetSuite. This could help prevent issues if there is a high impact on Assets and Cost of Sales. However, please note that this might stop the sales order and invoicing for kit package items which have inventory items as part of their components. If you're unable to prevent negative inventory by enabling this feature, you could try to offset the negative inventory through the import option.