I have a database with many fields, and among them I have the fields gold, gold price, sold gold, and account. I would really like my members to be able to log in, and fill out a form selling their gold. I want the gold they want to sell to be subtracted from the amount of gold they currently have in the database, and added to the sold gold field. And, I also need to take the amount of gold they sold, multiply it by the gold price, and add that amount to the account field. All of these fields could have data that is already in them as well. I would like to be able to add to the appropriate fields, and add to the amount currently in those fields. I'm pretty sure I have to use some front end code and back end code. However, I am stumped after weeks of trying different combinations. Any help, with any of this, would be greatly appreciated.