The print screens on how to set-up the item inventory and invoice were very helpful. However, I guess I do not understand how the invoice takes a quantity from Product Testing, if there are no quantities to start with in product testing. 

For example, an invoice for 100 CD4 Wicks is received and entered. The item selected is CD4 Wicks (Not CD4 Product Testing). We then use 10 wicks for Product Testing. How do the 10 wicks get moved from the regular CD4 Wick Item Inventory to the CD4 Product Testing Item Inventory? I do not see that the invoice does this. Thanks again!

It makes sense to me up until the point of moving the 10 quantities of CD4 Wicks. Thanks!