Search/filter contacts by "letter sent" between dates
I'm new here, trying to use the tool effectively.
Recently I sent letters to a group of customers, and marked each as having completed the task, with the subject "sent letter".
Now I want to make followup calls to each of those customers. I thought that would be straight-forward, but I cant figure out how to construct a filter or search for:
Give me customers with:
Task "sent letter" complete
Task completed between "2/20/2012" and "2/25/2012"
Can you tell me how to do that?