Discount price for buying any 20 products

hi there.

i have hundreds of different stock items, each of which sells for $9.95.

i intend to offer a discount: buy any 20+ items from the catalogue and receive a 25% discount.

i want the checkout to automatically recognise that the special price be applied and charged at checkout when 20+ items are in the cart/being bought at checkout.

less importantly, i would like the cart to show the discounted prices and total once 20+ items are in it.

** i would like to do this by admin settings options if i can (and not by code/programming).

thanks very much, matt.

The Quantity Discounts contribution is available at
http://www.zen-cart.com/index.php?main_page=product_contrib_info&cPath=40_47&products_id=235

The FAQ for this module is at
http://www.thatsoftwareguy.com/zencart_quantity_discounts.html

You want to discount by "Total Items in Cart."

Good luck,
Scott

thanks very much.

matt.