Rest API - Order - no amount from all articles ?

Hello, is there a way to get the amount from all articles in one specific order ? Can’t find anything, i have an order with 2 articles on it. Article A - Quantity: 1 Article B - Quantity: 2 I’m looking for something like “amount of all articles”: 2 or “quantity from order xxxxx”: 3. But as i said i can’t find something similar. Thank you.