i sent out 3500+ free samples that were ordered from my site. now i am trying to figure out how many of those customers are ordering from my site now. the problem is that i have to go one by one through all the orders and then go to customers and check if they ordered the free sample before..
is there anyways that you can sort customers by number of orders?
i need to see how cost effective this promotion was before allowing it to run again.




