Just like the fastener issue on the 787, it would be fair to assume that a good number of them will not be readily accessible, so lets assume 1 hour per fastener, plus the cost of the fastener say $2 each.
So we start with $456,000, assuming that with overheads, Boeing costs are $150/ man hour.
3000 hours is probably a one month delay per airframe. This would represent a 2% delivery penalty based on half percent per month to a maximum of 5% of contract value.
At $60 million each, the penalty becomes $1.2 million per airplane, and they build around 30 per month.
On top of this is the lost (delayed) revenue, so conservatively they are losing $2 million per plane.
Expand that to the 787 line issues, the 748 problems and the numbers are horrendous.