Hello, I have a form with a subform. BOth forms a re linked over a primary key "order" In the form I let the user enter values; e.g. date from / to Price In the subform (consists of a query with date percentage and other predefined values) I want to display the results of the data entered in the form and the predefined values in the subform. There should be a button calculate which starts the multiplication of the results. What code does this button need to run the calculation? Thank you for your help!!!