A summary of LRIP 5 shows this.
$138M 10May10 Long-lead-engines (then 42)
$522.5M 6Jul10 Long-lead items (then 42)
$4012M 9Dec11 Airframes (30) (TBD,defined EOY 2012 *)
$485M 27Dec11 Non-recurring requirements
$1122M 27Dec11 Engines (TBD,defined EOY 2012)
$56.3M 13Mar12 Sustainment
$127.7M 14Dec12 Required to define end of year airframe order
$6463.5M -- Total
What is in bold should have been updated with an official defined DOD contract at the end of 2012.
And what was previously mentioned:
*Aviation Week predicts this contract (now for 32 F-35s) will be for $3800M, which if true (when the pending contract is announced) will put current LRIP-5 procurement at $6251.5M. This will change again once a defined contract for the jet-engines is released.