I need another attribute for each product in Magento that works in the same way that weight does.
When the order is placed I want to be able to call the attribute but for it to already have done
product1.new_attribute + product2.new_attribute + product3.new_attribute = new_attribute
The reason I need this is for my shipping, I want to be able to tell me courier how many boxes Im sending for each order 1 box can be made up of a number of different products.
Can any one point me in the right direction as Im not sure where to start?