I have the sum of some values of a data table that I need, to that value I need to subtract from the total sum of users “CEDULA” The “CEDULA” is equal to “123456” and it adds the value that corresponds to this user in the column “IBCS” to which this user corresponds and subtracts it from the total value initially stored in the “CEDULA”.

I have stored the value of the sum of the “CEDULA” I need

to this value that is stored I need to subtract the value that corresponds to this user “CEDULA”

But I still can’t get this value down

Help please