FYI With weight watchers, you eat what you buy at the grocery store. There is no food that is purchased from weight watchers (they do sell weight watcher brand items in stores but they are not a necessary part of the program, just a convenience thing). I do weight watchers and feed a family of 5 for between $300 and 400 a month. So still, the figure is inaccurate, but I do think its better that you changed your flier to reflect that it does include the cost of food.
Good luck with your business!