Subtotal after filtering data

Question

I have a spreadsheet of approximately 2,500 rows. Each row is one expense incurred since about last September. What I'd like to do is categorize the data across the cost centers (one column) then filter them for the current quarter (a date value in another column).
If I use the subtotal calculation in the category header row, I get the subtotal for the entire category, not the category filtered for the date range.
Any thoughts?

Answer 1

Hi Doug,
The categorize feature of Numbers 09 tables is basically a viewer with some nice features, but with limited utility beyond viewing.
My preference would be to use SUMIFS expression(s) to get just the summary I want, in a separate table where I can make Charts, do comparisons, etc. If you need some guidance setting that up, there is a Numbers User Guide and a iWork Formulas and Functions User Guide, both available from the Help menu. Plus, it's rather frequent question here, so the discussions search function should return many examples. You'll find that SUMIFS is very powerful and should do just what you need.
My thoughts,
Jerry