get_invoice_items
Returns all products (invoice items) included with the reservation (same as products used on the invoice). The invoice items can include (besides reservations): additional products, custom products, payment surcharge. In case of the shopping cart, all shopping cart reservations will be included.
 reservation_id int required
Reservation ID
 method string required
must be set to 
get_invoice_items language string optional
by specifying a 2-letter (ISO 639-1) language code (all capital letters e.g. EN, DE, FR, ES, IT) you can change the language of the text values returned
 api_key string required
your API key - 
Click here to get your key. If your API key uses a hash key, you must also include the parameters 
hash_key and hash_timestamp.
 results array
Array whose items are named arrays with the following keys: name, quantity, price, price-gross, tax
Click here to test this function in the API playground.