I invited 25, I plan for 25. RSVP seems to be rather unknown in my area at times, it can be touch and go. I have run into the non-RSVPs that show up anyway with friends in tow, so I typically try to plan for that. No news means no show, most of the time, I think, so you should only be dealing with the 14 that called, but maybe plan on two or three extras just in case. I have handed the extra goodie bags over to siblings, which they love, as if they got to go to the party too. My children have received the same when I go to pick up brother or sister, and they always enjoy this.