The transaction proposes the invoices to be transferred based on the following calculation by "assignment".
1) Only 1 line item for the assignment
- If Debit => proposed for transfer

- If Credit => not proposed for transfer

2) More then 1 line for the assignment
- Total "Amount" and Total "Quantity" = 0 => not proposed for transfer (documents have to be cleared)

- Total "Amount" not = 0 and Total "Quantity" = 0 => not proposed for transfer

- Total "Amount" an Total "Quantity"< 0 => not proposed for transfer

- Total "Amount" an Total "Quantity"> 0 => the detailed document aren't proposed for transfer but a line for the difference is calculated and proposed for transfer

(please confirm if the phrase below is in the written in the right place)
Basically, the program searches all the invoices received without corresponding goods received in the month, posted by a "Sales company" (= company which sells goods produced by another company) and books in the "Stock in transit" account with counterpart in the "Internal - Vendors accrual account.