Is it possible to cancel the transition to the next element of the cycle?

Question

1C

We have a table with goods, it has one of the columns "Quantity". When sorting through the table through the barcode scanner, the quantity is set. If the quantity is less than in the row of the table, you need to start a new cycle until the total quantity transmitted through the barcode scanner for this item is equal to the quantity indicated in the row.

In the upper table is the nomenclature that we sort through. In the "Series" input field, a series is scanned and using it we look for the remaining goods in the warehouse.
Further on the balance, we check if the balance in the warehouse is less than the quantity in the first table, it is necessary to start the same second cycle. If there are any other solutions, I will only be glad to help.

Answer 1

until the total quantity transmitted through the barcode scanner for this item is equal to the quantity

well also start procedure or function under these conditions... well or a code piece.
What's stopping you.

Answer 2

Classic loop with postcondition LOOP ххххх
x = x + 1; WHEN x < n