A developer needs to implement a business rule around shipping: Anything over a certain amount...

The correct answer is A and D. To implement a business rule around shipping, the developer will need to create a class that implements the sfdc_commerce.CartShippingCharges interface and may need to contain logical branchingto handle different scenarios12. The sfdc_commerce.CartShippingCharges interface is a standard interface that defines the methods for calculating shipping charges for a cart1. The developer can use this interface to override the default shipping logic and apply custom rules based on the cart amount or other factors12. The developer may also need to use conditional statements or other logic to determine when to use freight shipping or standard shipping3.

The implementing class cannot call out to another service and a class will need to implement the sfdc_checkout.CartShippingCharges interface are not the correct answers. The implementing class can call out to another service if needed, such as an external shipping service or a pricing engine2. The sfdc_checkout.CartShippingCharges interface is a deprecated interface that was used for calculating shipping charges for a cart only1. It has been replaced by the sfdc_commerce.CartShippingCharges interface, which supports both carts and orders1. References:

B2B Commerceon Lightning Experience Developer Guide

B2B Commerce and D2C Commerce Developer Guide

Salesforce Accredited B2B Commerce Developer

sfdc_commerce.CartShippingCharges Interface

Integrate with Lightning B2B Commerce

Shipping Rules 101: Here’s What You Need to Know