ok, but can I say:
"Number Of Items with a specific Item Value"
If the Total number of items where "itemType" has a value of "DVD" OR "CD" is "<=" "2" ??
I added "OR 'CD'" to the above. So I want to apply the exact same shipping cost to both columns at once. But it has to be if either or is in the cart, because, of course, sometimes the orders will just be for CD and sometimes for just DVD.