What is the Fulfillable field used for on a transaction line?

AI generated answer (using internal Slack threads):

The Fulfillable field on a transaction line in NetSuite is used to indicate whether a particular line item on a sales order can be fulfilled. This field is typically used in the context of item fulfillment transactions. When a sales order is created, each line item on the order is marked as fulfillable. As item fulfillments are created and linked to the sales order, the fulfillable quantity on the sales order line item decreases. Once the fulfillable quantity reaches zero, it means that the entire quantity of that line item has been fulfilled. In the context of custom transaction line fields, these can be created on an item fulfillment and sourced from a native transaction line field on the sales order. This allows for additional information to be carried over from the sales order to the item fulfillment. However, the custom line field would need to be added to both the sales order and the item fulfillment. When the item fulfillment is posted, it will natively copy line fields from the sales order it was created from. ****** Disclaimer: This response was generated by an artificial intelligence assistant based on previous conversations from multiple Slack channels, and may contain inaccuracies or mistakes. ******