Hi I have a problem with calculating data. I need to do a database wher I have a products and their costs in one table, do a one to many relationshop to another table (orders) then calculate an overall cots based on cots of the products selected and amount of products selected. I can calculated this in query but I don't know how to insert data into field. I'm new to databases. I hope anyone know what I mean and can assist me as I already spent few hours on that one field:/