I sell plants and usually add shipping over the base shipping per item. I set a handling charge for each item - and used the multiple shipping option (make sure you add two options). One option is the regular shipping (for my cart it is $3 for shipping 'standard' and 10 more for deluxe - but not expecting anyone to choose that). The 3 + 2 is the base shipping for one item. Add 2 for each additional item - which tracks what I want to charge. Works for me - so I thought I would share it for anyone who can use the paradigm.
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Life should be a little bit nuts. If not, it is just a bunch of Thursdays strung together.
Life is short, Break the rules, Forgive quickly, Kiss slowly, Love truly, Laugh uncontrollably, And never regret anything that made you smile.
Life may not be the party we hoped for, but while we're here we should dance....