Thanks Madawc. I am using Crystal 2008. I actually downloaded that book for Kindle on my iPad, but I can't seem to find specific formula information, like ways around summing fields that cannot be summed, doing complex calculation formulas, etc.
For instance, right now I have a field called TotalCostbyUnit that calculates the following formula: sum({@totalqtycost},{DailyVehicleTracking.VehicleNo}).
TotalQtyCost is: {PartsUsed.numpartsused}*{partslist.cost}
I can sum it by unit, but I can't put a grand total in for all units because it says that TotalCostByUnit cannot be summed. It's things like this that I want to understand.... and I want to be able to know if/how I can get around it.
Thanks,
Di