Thanx Francisco,
It is not item charges I am looking at capturing the PO raised is for the item of external labour only, no other product. I cannot perform it as part of a build either as we sell individual items but get them installed by another party, this other party of external labour are the ones that the item and PO are for. I then want to charge customer for their installation, but the next time it occurs it will be at different cost.
Am going to try and test with drop shipments but don't know if this will work on the costing side.