Assuming you want to sum up the "Apps Taken" on the "Weekly Activities" sheet, you will want to add that column to the formula:
=SUMPRODUCT(('Weekly Activities'!$B$15:$B$10054='Activities Summary'!$B9)*('Weekly Activities'!$J$15:$J$10054>='List 2'!$T$2)*('Weekly Activities'!$J$15:$J$10054<='List 2'!$T$3)*'Weekly Activities'!$O$15:$O$10054)
Secondly, the formula in that column:
=IF('Prospect Pipeline'!$S13="Customer",'Prospect Pipeline'!X13,"")
will need to be changed to:
=IF('Prospect Pipeline'!$S13="Customer",'Prospect Pipeline'!X13,0)
to maintain the numerical values required.
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