Negative quantities posting to I/C

SUGGESTED

We are currently building a pump, the way we process the job is to charge everything and then at the end we post a negative quantity of the completed pump to balance the numbers.
Unfortunately, now that I need to close jobs for the end of January next week that step got lost in procedures and I can't figure out how to do it.

If I go to parts inquiry and look at past transactions I can see where they had done this before. It is listed as a "Receipt", quantity of 2, and a positive cost. But if I check the job transactions reports it will display them as negative quantities and cost.