@pbmarrow wrote: ``I keep getting error messages and I can't figure out what Excel wants``
Neither can we, since (a) you do not tell us or show us what the error "message" reads (or is it really an error value like #VALUE?), and (b) you do not show us at least the offending Excel formula, and it is better to also show us the referenced values.
For quicker dispositive explanations, it is best to attach an Excel file (redacted) that demonstrates the problem(s). Click on the "browse" link at the bottom of this forum's editing pane, to wit:
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@pbmarrow wrote: ``I want to add two separate sums [...]. For instance, the sum of g14:g28 and the sum of g30:g43.``
The description is ambiguous. Of course, the description would be disambiguated if you showed us the formula(s). BTW, it should not matter what subranges that you sum.
You might have the formula =SUM(g14:g28) in A1 and =SUM(g30:g43) in A2, for example, and the offending expression might be A1+A2 or SUM(A1:A2) or SUM(A1,A2).
Or you might have the expression SUM(SUM(g14:g28), SUM(g30:g43)), which is better written SUM(g14:g28, g30:g43).
In the last three examples, the problem might be that the parameter separator for you computer should be a semicolon (";") instead of comma (","). In other words, SUM(A1; A2) or SUM(g14:g28; g30:g43).
Generally, the parameter separator is the "list separator" that is configured in the Region and Language options for your computer.
However, I have seen postings where users claim that Excel Online ("Web Excel") and Office 365 Excel use a different configuration intermittently; presumably a temporary defect. I have no first-hand experience with those products. So, if you suspect that problem, hopefully someone can help you work around it. Or simply wait for MSFT to patch it (sigh).
