I believe the trick is to impute costs, when they don't exist because something is free (shipping cost was not charged in the purchase transaction so is not part of the value) or items not paid for are brought in to give to Belizean recipients as a donation. It's another expediency to further the goal of getting hold of cash. Greenback dollah cash preferably. Theoretically you would be denying a Belize business of a sale of the goods and the GOB of the sales tax. Never mind that the items you're bringing in to donate are not now nor will they be in Belize retailers' inventory.