The cost of a player is not the only consideration of their worth or place.
I always go bakc to the direct comparison of when we acquired Murray (first time around) and Forster. The former cost £300,000; the latter £75,000. Does this therefore make Murray four times better? Of course not...
Because Chris Hughton is an experienced, intelligent and thoughtful football manager, having been in the game for over 40 years. He sees the players week in, week out and knows who can do which job. He also knows the relative readiness and appropriateness of each player in any given situation...