Thank you for you interest in CS-Cart shopping cart software.
By default CS-Cart allows defining quantity discounts per product only. It is possible to sell 1 item at $19, 3 for $50 and so on, but this is true for one product only. In case you need to be able to group products and set discounts for them, some custom work will required.
Please contact our sales manager via Contact form at [url]https://www.cs-cart.com/request_quote.html[/url] for a quote.