Use this when you only need quick totals, not the full item list.
Great for:
Why this exists:
The ID of the basket to retrieve
The summary totals for the basket
Total number of items in the basket or for a seller
x >= 0Total number of cards in the basket or for a seller
x >= 0Total number of products in the basket or for a seller
x >= 0Total price of the items in pence in the basket or for a seller
x >= 0