Different ways

A bit sarcastic: That's exactly the plan I have in mind / Yea, that goes without saying / 

Neutral and subtle: Of course!  / I wouldn't do it in any other way / Duly noted

A bit confrontational: Sure, I'll definitely take that under avisement / Thank you for the great suggestion

Very sarcastic: Oh, thanks, I wouldn't have thought about that in a milion years....

Very confrontational: Thanks for the communication 101, I would ...

Many ways.