Hi Beverly,

Have you tried using conditional formatting? You don't have to write any
code for this. Just go to cell C1, select Format-Conditional Formatting,
select cell value is not equal to B1, then click the "Format" button and
change it to something like a red background with bold font.

That works, but I need to do this for every single row in a very long
table. Is there a way to generalize the rule so it covers all the
rows, not just one-at-a-time?

Thanks!