i'm trying to create a database that will store resource information like books, subscriptions, online subscriptions, CD-ROMs, etc. I need to track their costs which is where I'm having trouble. Some of these, especially the subscriptions would have an annual fee and a monthly/weekly fee. How can I track how much is due each month while knowing whether this is an annual cost or a monthly/weekly fee? Do i need 2 or 3 separate tables to record this information? Do I need to type every month a different due date?