I have a large spreadsheet with 12 columns and 2400 rows. I use a filter to
bring up one account that shows me sales for each month, each month is on a
separate row so the filtered results have twelve rows of data. I then
subtotal the results which add up the twelve months of data, per column. The
question, how can I now use the results shown to add up just the 1st quarter
results, not the twelve rows of data? This needs to work after I select any
customer.

Thanks,

Paul