11-28-2012 11:47 PM
na
11-29-2012 02:38 PM
Before paying, message the seller and ask them to send you a revised invoice with the combined shipping cost. Then pay once the invoice is received.
If you have already paid, kindly ask the seller if they will refund you the difference in shipping costs.
11-30-2012 12:20 AM
Usually, when you get the invoice from the seller, the shipping will have been modified to reflect the discount for combined shipping.
If not, a polite enquiry usually will garner a corrected invoice.