I want to sell a product by the case with the option of a mix and match (multiple choice) of 5 flavors. I know I can set a minimum purchase of 24, but can I set a maximum of 24 also? I don't want them to order 25 or 26, etc. Only totals of 24 in a case.

It's not a feature, but if you know a little javascript, it can be done on the proddetail page with no mods to the ect files.
Basically you would setup the product itself with the capability to order only 24 mix and match. Use multi purchase in your options.
Then the javascript would take action only on that product (if statement) and with javascript you add up the total quantity the customer has selected and fire an alert if the total quantity is less or more than 24 total.
Using javascript you can prevent the adding to cart until they have exactly 24 in total in quantity.
I believe this would be fairly simple to achieve.

Thanks Dave,
I wish I was that talented.