We are facing consistent walls in getting some simple calculations from a summary total reporting level. We have created numerous summary reports but cannot do simple calcs using the summarised totals i.e. working out margins between two total values, subtracting one total value summary from another etc. It would be really great if we could create further summary fields calculating from summed totals. Has anyone got a workaround? we seem to be having to create many tables to get around this but now hitting walls as some calcs are just too deep nested at lower levels.