Complex sentence: The concept is then transferred to the reprographics company as a Bid Set (For Purchase) which is then produced once and the copy is then mailed out to the general contractor and the original back to the originator.
Split into simpler sentences: The concept is then transferred to the reprographics company as a'bid set'. This set of originals are then reproduced and copies are sent out to the general contractors and the original back to the originator.