Does a completed training job incurr charges?

Hello.

As you can see in the screenshot below, there are couple of completed jobs in sagemaker. (Similar in the processing jobs and training jobs menu.)

If I select one and click the actions button, the Stop menu is inactivated, as you can see.

Does this kind of completed job incurr charges?

If so, what do I have to do to Delete or Stop this job?

Thank you.