Answer:
A trigger that upon saving
customer order, will make a real time callout saving the pricing back in Salesforce
Explanation:
Salesforce a software that is used to organise customer interactions in such a way that transactions between the company and customer is effectively managed by the software.
In the given scenario pricing needs to be handled by an external system. The response will be returned and stored back in Salesforce.
Instead of doing this manually the best solution will be to have an trigger that starts a real-time callout, saving the pricing back in the salesforce.
An trigger allows one to perform customised actions before or after an event. The action can be an update or deletion.