I have a table called tblInvoicesSubmitted. I have a field named named DateSubmitted and a field named DateCheckRequested. It would also include a field named InvoiceID for identification purposes. I need a calculation, for Access, that will calculate the number of days inbetween these two fields (for example if it was 30 days). I want this calculation to show up in it's own field and then to be sorted by largest to smallest.