I am trying to make a chart to figure weight lost gains and losses per person. I need the beginning weight for the month with week 1's weight, week 2 and so on. I also need, in between the weeks, the gain or loss amount which I have figured by subtracting the two. When I get to the end of the month, I have to know each person's amount gained for the month and each person's loss for the month. This is when I am having problems because the weekly weight is in between. I have figured out how to do this in columns per week for all the participants, but not across for the individual.