I have 2 columns, machine type and install date. What I want to do is count the number of machines per type once they are installed. So if there were 3 "Machinetype1" installed 11/29/13, I want another cell to keep that total 3. I don't care what the install date is, as long as it is filled out. In another cell, I will keep the number of "Machinetype2" installed.