how to add discount? Simple Paypal Shopping Cart

for example” I am offering a product for 10$, but I want to offer same product 2 for 15$..

how can I do it that it will automatically appear on the Shopping Cart?

I am working with Simple Paypal Shopping Cart and nexgen gallery

Thanks!

[ 1 hour and you’re bumping? Really, don’t do that. It’s not permitted here. ]

[ closed – duplicate of https://www.ads-software.com/support/topic/plugin-wordpress-simple-paypal-shopping-cart-how-to-add-discount ]