Shipping: adding a per-item charge to postage
I followed the instructions on the "Using Calculation Rules to Add Per-Item Shipping in Commerce Shipping" screencast
only ever seems to provide a '1' in the shipping calculation for each product type in the cart - not the quantity of each product type.
Is there a way to tell what values are held in the things like
commerce-line-item:quantity or then many other parameters as some of them seem quite ambiguous to me.