Thx. I changed it.
SELECT Vehicles.VehicleID, Vehicles.[VIN Number], Vehicles.Make, Vehicles.Model, Vehicles.Year, Vehicles.[Price (JYP)], Vehicles.[Price (AUD)], Sum(tblExpenses.Amount) AS SumOfAmount, [Price (AUD)]+Nz(Sum([tblExpenses]![Amount]),0) AS [Est Cost], Vehicles.[Rec No]...