Then appears another problem, how to group a data in Query (picture attached)? And group should be done by name and by Invoice No, that I could use these calculations in my report. Consequently 1 and 2 row should appear as sum as it is the same Product (Name) and the same invoice. How to summ [Weight] field separated by Invoices? I have done this in a Form, but I can't use calculated fields in form as well for my report.