I many times need to add additional numbers to the bottom of a column
of numbers that I'm summing. When I do this, I always have to reformat
so the underline is at the new last number instead of at the original
last number. Is there a way to "overline" the sum instead of underline
the last number? I know that I can do this using borders, but I want to
be able to actually use an underline with the accounting format.