In switching from Lotus to Excel, there were a couple of Lotus @functions
that I used fequently. I liked the @subtotal and @grandtotal. The @subtotal
works similar in Excel, but in Lotus, you could use the @grandtotal that
would only add all the cells in a list that contained @subtotal in their
formula. So, if a cell only had a number and no @subtotal, then it would not
be added, but if it had @subtotal, it would be added.