Selected Enum price automatically multiplied with quantity

[Caps]

Hello again! please help me with this one 😞 

My ProcedureID is ref in my Procedure table where my Procedure Cost came from.

I just wanted to add some solution in my [Total Procedure Cost] column that if I selected one of these ("Bonding", "Extraction", "Denture", "Filling") in my [ProcedureID] (Enum), I want it to automatically multiply with my [Tooth Involved] * [Procedure Cost]. The rest in my [ProcedureID] will display its original cost.

Expected outcome:

 I really appreciate any help you can provide.😊