SUM on Units On Hand for each row
May I know how can I sum up for each of the row. Attaches picture is the example.
In the 1st row, user key in 5 and I would like the "unit on hand" shows 5. Continue by the 2nd row, the user key in 2 qty as out transaction, and I would wish the "unit on hand" can shows 3 instead of sum up all the 3 row.