I would like to place the total value of line item '%' in line item 'A'. In other words, I would like the amount 17,259 to appear in all the fields, but I haven't been able to do it. Could you tell me the formula to achieve it?
If the total is at the top level then use SELECT. If it's a parent level use LOOKUP. You'll need to use a system module for this.
A = %[LOOKUP: SYS01.Parent]