These are Dynamic formulas with IIF statements. There is a variable in the formula so they are not basic or simplistic. So please read through the attached carefuly before bidding or accepting the project. The formula are DateDiff but the formula depends on whats selected in one of the fields on a form in the database. My Max price $45 US. Please Dont bid more. If you know what you are doing this will take you less than 30 minutes to do.