Cost of Ring Resizing & Stone Addition: What to Expect

Question
I was curious to know how much it would cost to resize a 4 kt gold ring and add a stone to it?

Answer
this is a loaded question, first I would need to know more about the ring, did you mean 14kt and does the ring need to be sized up or down how many sizes , does it have stones already ? what type are they , what kind of stone do you want to add, there are a lot more questions the jeweler will need to ask you and most likely have to see the ring in person, I work wholesale for other jewelry stores and even I would need more info.