Sort Order

Hi,

I am trying to add a Parameter Sort Order. The existing report sorts by Salesperson, Customer, Item then Year Period. I added a parameter prompt.

SortbySlpsZip (Yes or No) I would like if 'No' is chosen the report prints as is, If 'Yes' is chosen the sort by Salesperson,Customer, ZipCode, item then Year Period.

So far I have not figured out how to do this correctly. Can someone help me set this up correctly ?

Thanks,

Debbie