I think it greatly depends on the overage. For instance you quote 89.00 and the shipping is 20.00. If you ship ups or fedex then the client will not ever know so your final shipping price would be up to you, then your will make a determination of how you treat your customers.
But If you spent 3 hours packing the article and 20.00 for packing material and 1 hour driving to send the package away then make sure you dont cheat yourself. You know whats fair just let that be your guide.
But If you spent 3 hours packing the article and 20.00 for packing material and 1 hour driving to send the package away then make sure you dont cheat yourself. You know whats fair just let that be your guide.