I have a similar issue I think - and really struggle with the principle of scope being a part time developer! I have a matrix that shows the last 6 months as columns, call types as rows, and the number of calls by type. I have managed to calculate the percentage overall of calls by type, but want to do a comparison to show what the percentage is just for the current month as well as the 6month total. How do I select a specific column value to work with please?