These "Boxed" items are more like "options" because they have the same product ID as the singles; I've simply multiplied the quantities to come up with a "boxed set." Because of this, I don't have product IDs for boxed items.
To make it more convoluted, this is a dealer area where they get special pricing.
I guess what I need is a graduated quantity pricing system. If they order 1 item, it's $5 each. If they order over 24 (or reach the boxed qty), it's $4 each.
If I had a consistent value like a Percentage off each, I could make a rule for this. However, because a rule is applied inconsistently to all of these items, I can't get my head around what a "general rule" would look like.
In addition, some of the boxed sets come in a box of 24 while others in a box of 6 so the rule would need to pull in those minimum numbers and apply the discount if those numbers were reached...