I can't supply specific numbers but I know it's a tough sell. Everybody wants EFBs but the finance guys always have a tough time justify the savings or efficiency gains.
Savings?
The Jepp contract is still in place - New infrastructure rqd to maintain updates elctronically.
You might save a bit of weight in paper
ACARs - not cheap
Crew can do their own W&B?
COSTs?
Up front - 100 hrs per aircraft to install?
MEL issues (need 2 efbs per a/c)
Maint rqmnts - anything short of toughbooks are brutal in terms of robustness.
Software maintenance infrastructure rqd.