I am seeking assistance with implementing client scripts in subform fields within the Quotes module. Specifically, I need guidance on how to configure an on-change event that will auto-populate fields in a subform.

Here are the details of my requirements:

1. Module: Quotes
   
2. Subform: Quoted Items
   
3. Event: On-Change
   
4. Objective: Auto-populate specific fields in the subform based on changes in other fields.
   

Could you please provide step-by-step instructions or examples on how to achieve this functionality using client scripts?