I have a very simple report showing the cost and sell of inventory items.
In the group summary I use the sum function with the cost and sell variables and they work great.
I simply want to show the margin in the group summary (100-cost/sell*100). I know I can use report variables to make this work but isn't there a simple way of referring to the sum of the cost and the sum of the sell in group summarys rather than just the last line of the details?