Adding a row count to a visual table

Thanks Alex for the link.  It contain some good information to healp introduce me to the difference between calculated columns and measures.  I am assuming what I need to do is somehow put a measure in a cell beneath my column that contains text and then come up with a a DAX expression that will simply count the number of cells in the column and give me a total number.  This is where I am a bit stuck on how to make this happen