I do not recall the occasions upon which these portfolios were utilized; but their professional appearance would indicate that they had been used for official meetings, either obtaining new clients or distributors, or for fund-raising purposes.
Shipping charges include postage (including USPS Tracking on domestic shipments), packaging materials, labor and fuel (the nearest post office is 14 MILES away!); but I do combine shipping charges on multiple items -- so fill up that cart NOW an' save some $$$!