The only advantage to my shabby little trick is that the OP needs to update
only a single SUM formula rather than a collection (potentially large) of
HYPERLINK formulas.
It's a good bandaid <bg>. But sooner or later, there's gonna be more formulas
that refer to those cells. And someday, someone will miss the fix in the new
formula.
It always scares me when the original source isn't fixed--although, I'm sure
everyone has had to do scary things like this (when you depend on someone else
for the data, especially).