Good morning! I am a newbie, so please bear with me. I am creating a form that lists the costs associated with a candidate. Some of these costs we pass on to our clients, some costs we pay for. I have a subform that allows the user to list each item (travel, test materials, off-site office space, etc.) separately and fill in a dollar amount. I am able to give our accountant the total costs related to the candidate simply by using =Sum([CostAmount]). But she would like to be able to also have an OurExpense check box. If this box were checked that amount would be subtracted from the total; then she could invoice the bottom line. How do I create an expression for that or do I need to create a query? Thanks, in advance for all your help! DC