Sorry, there is no Inventory2000Data.mdb so we can't render your report. But we will try to guess.
Please, try to create a variables (TotalSum) and use next expression:
Code: Select all
{TotalSum += Sum (round(Parts.SqInch*(Parts.InvParts.Cost*Parts.InvParts.WASTE),2))}
If you still need our help, please, send us all necessary data for your report template.
Thank you.