When it comes to framing, usually the galleries want you to provide the display samples that go up on the wall pre-framed, but they will handle framing for the customer (and make 100% of the profit on the framing) because the framing is where they have their greatest profit center, not the artwork itself. They're just being cheap by asking you to frame the work on display for them because that's one more investment in overhead they don't have to make. Once you have an established sales record with them, that MAY change (if they know you're going to sell out the show, then they MIGHT comp you the frames or do the framing for you at cost).