Jim's changed the entry in the "Signed" column from "signing" to "?" - not sure what that means, but it's not encouraging.
That said - if they're going to throw all they have available at Carpenter, then yes, they can't nail down that number until they get Eastman and Stokes done. Stokes should be easy - they offer him something, and he either signs it, or goes to work for Amazon. Eastman's more of a negotiation - trying to find the minimum bonus he'll accept, to maximize what they can do on Carpenter (and possibly somebody else).
Aside on Stokes: Last year, the 10th round pick, also a college senior (Connor Brogdon) got a $5k bonus.