What's wrong with my Magento coupon?

I'm tasked with creating a coupon code in Magento that will do the following:

• if the customer purchases one bin (GCO350), one box from a category of items (box a), and one box from a different category of items (box b), they get three free items from yet another category of items (prize).

Here's my logic (conditions and actions) with (hopefully) helpful annotation:

What am I missing here? I've tried these as categories as well, in this example I literally selected every SKU that is applicable. :( Mage Wizards, help me out!

Nevermind. It appears that you need to separate each category out into its own line in order for Magento to consider them all separately, so the answer is:

Silly mistake.