I'm a little confused by this. The price of labels only (regardless of whether for 39mm or 43mm chips) is 14c per chip (7c per label). The price difference between labeled 39mm chips and unlabeled 39mm chips is 18c per chip (.74-.56). The price difference between labeled 43mm chips and unlabeled 43mm chips is 22c per chip (.82-.60). So the charge for applying labels to 39mm chips is apparently 2c per label (4c per chip), but the charge for applying labels to 43mm chips is 4c per label (8c per chip), or twice as much?