Replace contents command Filemaker pro 11

I want to see if there is a way to speed up the 'replace contents command' in Filemaker pro 11. I have attached a sample of database that I need to be able to add and remove the number 1 using the replace command. The example attached works fine, because I only have a handful of records. But in production, I am going to have thousands of record. I don't want to a global field to set up the field with 1, since I am going to be using the exact number of records flagged to 1, to show up in a portal relationship. I cannot used an calculation field either.
Replace-Contents.fp7