Assuming it's 13 forwards, 8 defensemen, and 2 goalies:
That would leave just under $1.1M in cap space.
I'm going to guess one of Monahan or Lucic gets moved, Valimaki gets moved, Stone resigns for $800k.
Which could leave anywhere from $6M cap space (if Lucic and Valimaki gets moved) to $7.1M (if Monahan and Valimaki gets moved) for free agent adds