Question is straightforward. The card lets you bank calculates when you miss shots, and then allows you to cash it in when you engage. It seems you can bank multiple calculates on the card. Consensus is that "closest valid attack range" means range bands, so if you have a target at R1, R2, and R3, you have to hit R1 even if it's reinforced Tavson and you blocked Kylo with 1 hp at R2. If you have multiple targets in the same range band, you get your choice as to which one you'd like to target.
So, what do people think this will cost? (Ignore what you think it should cost, please, lots of potential bias in that answer.)
Also, please note this is not faction restricted, only initiative restricted.