Drupal Customization

Hello All, I need a drupal expert. Make sure you are expert. You should be available for 8-10 hours/day. I need few customization done in the under development website. First Task: I want a form in the backend of drupal to set discount code form. The form should generate a quantity of codes to use with the amount of money OR the percentage off for memberships when they subscribe So for example: A member loggs in and clicks on subscription product checkout. They need to see the discount code textbox on the checkout form Ovbiously all the functionality behind is just to take the percentage off from the product ammount Let me know if u have another approach to this feature, or if you already talked to Nhu about it. Just ahead while I do minor fixes that Nhu gave me. Only Experts Please. Thanks Ravi M.