Nancy said we have a part #, called MISC, which is an N part, and has always had no costs.   However, in March, all of a sudden, there is a cost for all the misc parts we sold.  
 
She wants to know what could have caused this to start happening now....?
 
She did say it seems to have started showing a cost with an invoice we did on a Sales order to a customer, with all MISC parts.  From that time on, we have had costs to this part.
 
Any ideas?

I think that's how this might have come up, since I was cc'd on an email to one of our purchasers about not using that part on a purchase order.  That's probably it.