I have a spreadsheet with 4 tabs of quarterly data (representing four
quarters in the fiscal year-Quarter 1 July-Sept, Quarter 2 Oct-Dec, etc).
That same spreadsheet also has a tab which sums the data on a quarterly basis
(with the idea of creating 4 additional tabs reprersenting a summary of the
data for each quarter). I just finished developing the tab which will
reference the first quarters data (for requirement purposes, the summary tab
is entitled "Quarter 1 Summary", and it is referencing data on the tab
entitled: Quarter 1 July-Sept).

My question is getting help in finding a quick way to create these
"additional" summary tabs that doesn't require me to re-enter all of my data
again. For example, the first "Summary Tab" (referencing the first quarter)
has formulas such as:

=COUNTIF('Quarter 1 July-Sept'!$C$4:$C$500,"OP")

When I create the next summary tab, it will reference 'Quarter 2" data:

=COUNTIF('Quarter 2 Oct-Dec'!$C$4:$C$500,"OP")

If I had to go through each individual formula to edit the references above
(consistent with the spreadsheet they are pulling data from) it would take me
forever. There must be a quicker way. Help!

Thanks,

Dan