admin amount amounts applied apply automatically bought breaks buttons buy buys cart cart-discounts common cost depending discount discounts item licenses min multiple number offer order orders pay price product products quantity sell shipping system total upto

I was planning to use the cart discounts for business orders (ex. multi-user licenses, 50 copies), but I noticed that the discounts are applied to the order total, not the quantity. I have 2 products with different prices, so it won't work.
Is there any workaround?

I can think of very rudimentary, lengthy and limited hack based on how our cart interprets min. amounts for which the discounts are applied.

It might or might not work for you depending on how many level of discounts you want to offer and what are your product prices. I don't think you will use it, but here it is anyway.

Say if one product is priced at $15 and other at $22 and you want to offer 40% discount for the $15 one if someone orders 10 copies or more and you want to offer 70% discount if someone buys 10 copies or more of the second one. You can set it up with following discounts:

40% off on a min. order total of $150 -->for 10 copies
0% on a min. order total of $150.01 ---> this will block this discount
from creeping into orders of your other product as it's order total will never be 150

40% off on a min. order total of $165 --> for 11 copies
0% on a min. order total of $165.01 ---> this will block this discount
from creeping into orders of your other product as it's order total will never be 165

.. and so on for 12,13 .. 20 copies

70% off on a min. order total of $220
0% on a min. order total of $220.01 ---> this will block this discount
from creeping into orders of your other product as it's order total will never be 220

70% off on a min. order total of $242
0% on a min. order total of $242.01 ---> this will block this discount
from creeping into orders of your other product as it's order total will never be 242

.. and so on for 12,13 .. 14 copies

the number of copies you can pull this off for depends on what's the lowest common multiple between the price of both products. In your case the LCM will be 15x22 = 330 and thus you can run this discount for upto 21 copies of the $15 product and 14 copies of the $22 product.

Where can I specify quantity price breaks, and shipping price breaks?

Go to Admin > Cart discounts.
Of course, they only work with E-junkie cart buttons.

I really need to know if this system can do this:

I have some CD's I want to sell. I would like to have it so that if they buy 1-4 CD's, they pay $2.50 a piece. 5-9 CD's, $2.00 a piece..and so on.. like 10-24 CD's $1.75 a piece 25-49 CD's $1.50 a piece 50-99 CD's $1.25 a piece 100+ CD's, $1.00 a piece. There will be
other things like hats at a regular price..

So, I need the system to know they bought 20 CD's and would automatically add up the final cost to $35. If they bought a hat that was $10, it would add that to the $35 (for the CD's.. 20 CD's x $1.75)
Does this make sense?

Sure, it does make sense but it's not possible. E-junkie cart discounts are amount based and they will apply on total order amount, not just on one item's total.