I've made a Excel Workbook with 5 worksheets. It all works but is extremely slow, once you start adding information. I believe the problems might lie on the Counts and Sources pages, where there are numerous SUMPRODUCT formulas.
=SUMPRODUCT(('Monthly Lead Tracker '!A:A=Counts!A3)*('Monthly
Lead Tracker '!F:F="DMS"))
If all of these formulas are at issue, is there some way to do the same in VB and if so, please spell it out, I'm not very good with VB. You will have to download the file however to get an idea at all of what's is going on in it.