How much would the minimum cost be to take me from B cup to double A?

I am 5 foot 4. i plan to have surgery after I can reach my goal weight of 123. I had a breast reduction at the age of 15. I only went from a c to a b and my surgeon didn’t even ask my personal desire, he just comes back while I was being prepared and asks how does a b cup sound. I asked for an a and he goes, we need to leave some tissue in there for blood flow. I am now aware that their needs to be enough blood flow coming through the tissue for the nipple to survive but I learned this through research from other surgeons online websites. they say loosing 2 cup sizes is ideal, my surgeon didn’t even measure me so my question is how much would the minimum cost be for taken me b cup to double a? I don’t care if the nipple has to be removed, I don’t even want it back on as a skin graft. Thanks