Add an invoice item to a booking
*Add New - adds the invoice item regardless of whether it exists or not.*Add New and Subtract - add an invoice item and at the same time add the same item with a negative value (to a different invoicee) making no nett change but effectively moving an item to a different invoicee*Update or Add New - updates the invoice item if it exists, otherwise adds it as new. *Update only - updates the invoice item if it exists but will not add as new.
Update or Add New - updates Invoice items are matched on the invoice item description and optionally status if it exists, otherwise adds it as newspecified.
Update only - updates If the invoice item if invoicee is not set to "ignore" it exists but will not add as newmust also match.
For type = "Amount", "Percent of Charges" and "Percent of Price" the quantity, price and vat values are updated on all matched invoice items.
Invoice items are matched on For the descriptiontype = "Change Invoicee", status and only the invoicee all being identical. Quantityis updated on matched items, the quantity, price and vat values are updated on all matched invoice itemsunchanged.