I need to have the expression boxes print something after the prior field is
filled in. I am creating a work book for my husband's diet but based on his
weight loss his points will change. So I am trying to figure out how to make
the expression box type out the necessary points for the week. Below is what
I am trying to write but since I am not familiar with the Infopath formulas i
cant figure out how to write it. I can do it in excel but this is o bviously
not the same.

If weight is greater than or equal to 250, points =28-35; if weight is
between 225 and 249, points = 26-33, if weight is between 200-224, points =
24-3.

I also need to have his weight loss calculated so that would be start weight
- current weight but how do i write that in the expression box?

If someone knows how to write it or can write it for me that would be great.

Thanks