Ghostgirl - I hope you don't mind, but I saved you some time and put a formula under the "total weight" box that adds all the numbers for you. You are welcome to delete it if you want, no hard feelings! I took it all the way out to the June weigh in... that way you don't have to add by hand.

You can still add new people, just make sure if you add rows that they are before row 58. I also added a box that shows the weight difference from month to month. It's only going to work, though, if everyone inputs their weight.