Is there a predefined variable name for the total number of products in a given category in the shopping cart? I need to tweak my usps.php code to prevent people from choosing a small flat rate box for quantities that won't fit in that. I've done this for specific product numbers and it works fine, but I now have six items in the affected category and I'd like to be able to exclude them without the program having to step through each product number one at a time. I've looked through the shopping_cart.php code but my brain is not finding it if it's in there anywhere.
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