"Susan" wrote...
....
AFAIK there'd be only 2 ways to do this - either a formula that
would put updated info into the correct cell without selecting
it, or by macro.
....

Formulas can't affect other cells' contents, only the values of
formulas in other cells that refer to the cell containing the formula
in question.

Macros are the only direct way to change the contents of cells that
aren't in the selected range.

As for indirect ways, it's a matter of semantics, but you could use
defined names to change the way formulas calculate without selecting
the cells containing those formulas.