Adding an account from a different node

Hi Experts,

I have a report that looks like

                                             Period 1 Period 2

ExpenseExec  Department 1     1000     1000   

ExpenseExec  Department 2     2000     2500

ExpenseExec     Total               3000     3500

The formula for ExpenseExec in the master is

ExpenseExec=Expense-Exec

Basically Expense has a Exec node under it. The user has asked us to change the formula to

ExpenseExec=Expense-Exec+Account200

While I want to change the formula, I am not sure what other reports it will affect.

I am thinking of two ways

1) Create another member with desired formula similar to ExpenseExec

2) Create a local member that adds the account to the totals that are already there in the account.

Is there any other way of changing this other than the formula?