Dynamic Pricing Among Multiple Categories

I am using the Dynamic Pricing Plugin from WooThemes.

I have four subcategories in a category. Each of the 4 subcategories has its own pricing structure based on quantity purchased. However, the quantity purchased needs to calculated based on the total across all 4 subcategories. So if a user orders 10 subcategory A items and 15 subcategory B items, the total pushes both subcategories into a lower price bracket. These prices are not the same, nor are they the same discount. How can I trigger the lower price bracket for each subcategory based on the total purchased for the category?

The pricing structure is working at https://greatnorthernweaving.com in the Rug Warps section. I am trying to update the site in WordPress at https://creativegroupmi.com/gnw.