I think you should send United Shipping Corporation the price in advance of the sitar, and for the balance they can make their invoice. The balance may be deposited in the Hawaii bank, and ask the United Shipping Corporation to send the documents: Revision history
Diff selection: Mark the radio buttons of the revisions to compare and hit enter or the button at the bottom.
Legend: (cur) = difference with latest revision, (prev) = difference with preceding revision, m = minor edit.