Consolidate Sales Documents in une Invoice Documents by Field Z

Hi experts, I have a request.

  I wonder if you can do this:

  When an order is generated are filled a Z fields in the additional data B, and when a bill for the VF04 is generated you want to search orders created previous mind that are not billed by the area of sales, customer and a Z-field order.

  Let's say a customer has two sales documents, and that the two documents the value of '102325' in the ZZCBL field in the additional fields B, and that has the same area of sales, and you want that at the time of billing, the two documents are consolidated into one with all their positions. I print documents in a SmartForm.