Hi jtr,
Ashish is right, and we should know the problem in detail to obtain a solution. So please forward the required file to him.
However, what I have understood from your initial query, the following might help you.
1. Add Office to Column Fields
2. Add Sales Person to Row Fields
3. Add Transaction to Data Fileld
4. This will give you "Count of Transaction"
5. But you need number of sales persons, office-wise
6. So, outside the pivot table area, below each office column, use the following formula
7. =Count(DataRange)
For example, assuming Pivot Table is in range A3 : D8, enter [ =count(B5:B7) ] in cell B10 for office O1, [ =count(C5:C7) ] in cell C10 for office O2 & so on.