About product bundile discount

I want to ask a question about Product bundle discount.

If I have 30 items in the same catalog, everything has different price,
I want that my customer can pick 3 items in this catalog have a fixed price.
e.g.

Item(1) = $29
Item(2) = $18
Item(3) = $58
Item(4) = $17
Item(5) = $66

Customer A: pick 1+3+5
-- Discounted Total: $50

Customer B: Pick 1+2+3
-- Discounted Total: $50

Customer C: Pick 3+2+4
-- Discounted Total: $50

I had find that iSenceLabs' ProductBundles almost can do it, but the extension
need to build every bundles by manually. Could any extension can build the bundles automatic
with a catalog?

Thanks a lot.

Ultimate Fee/Discount can do this, though note that it's an Order Total extension, so the discount won't show up until the customer adds the items to their cart. Then, it will show up as its own line item on the order, as a discount to offset the pricing difference. That's how Order Total extensions works, so if that won't work for you then I think this extension probably won't work either.

If you're fine with that, you'd set up a Product Group for the relevant products/categories, then set up a Charge like this:

------------------------------------------------------------------------------
CHARGE #1
Title: Buy Any 3 For $50
Group: A
Charge Type: Buy X For $Y
Charge Field: 3 = 50.00
Rule: Product Group: Cart has items from "any" members of "Buy 3 For $50 Products"
------------------------------------------------------------------------------

If you want it to apply to ALL items in your store, you don't even need to create a Product Group, just leave that rule out.

Feel free to take a look at the screenshots and demo site, and if you're interested let me know at www.getclearthinking.com/contact if you have any further questions.