I'm trying to make an ammunition DB where I can calculate the cost of qualifying. I have made a query where I have records with rounds out and rounds in. The query calculates the cost of each record using this: TotalCost: ([RoundsOut]-[RoundsIn])*[AmmoCost]. I'm trying to create a form which with list the caliber once and then total up the AmmoCost. Does anyone know how to do this?