I want to be able to sell a single product and offer volume discounts based on a range of quantity of items purchased at checkout.
So, it they ordered quantities in a range, their discount would be automatically adjusted:
1-10 of the item, they would pay $25.00 (no discount)
11-19 of the item, they would pay $20.00 (20% discount)
20-29 of the item, they would pay $15.00 (40% discount)
I want to have the cart determine the discount amount based on the number of items ordered within set parameters.
So if someone enters 15 items at checkout, the discount automatically is 20% and it cannot be adjusted by the customer (and so on.)
How do I set this up in my product or cart?