I need to be able to offer on the spot deals for products. When a customer lands on a product page they are offered a 10% discount on that product if they add the product to their cart within 5 minutes.
1. The discount is per product, it apply to each and every product they add within 5 minutes of viewing.
2. The discount should show in the CART
3. The discount is only applied if no other discount is used.