Technically, it’s a revision because they are charging to dissolve or remove the filler.
So when I added up all the individual parts it comes out to 5.45 million based on your quote on the low end. That .5 for the filler removal is bringing up the price.
I wouldn’t say that price is bad, you might be able to get it at 4.2 to 4.6 at other places, but the agency is also going to take care of you and giving you some peace of mind. You’ll have a staff on call to assist you.