Default line items on an order

The basic order total line items, which are enabled by default and will show for most taxable orders, are as follows:

Subtotal:
Shipping:
Tax:
Total: 

The entries for subtotal, tax and total have no configuration other than sort order.

Order total shipping has additional configuration settings which allow the configuration of free shipping (optionally over a threshold, and optionally limited to national and/or international).

There are also discounts and fees which can be added to an order.