Which of the following statements is true? I. The selling division in a transfer pricing situation should want the transfer price to cover at least the full cost per unit plus the lost contribution margin per unit on outside sales. II. From the buying division's perspective, when a transferred item can be purchased from an outside supplier, the price charged by the outside supplier represents an upper bound on the charge that should be made on transfers between the selling and buying divisions. III. Whenever the selling division must give up outside sales in order to sell internally, it has an opportunity cost that should be considered in setting the transfer price. IV. The transfer price used for internal transfers between divisions of the same company cannot affect the divisions' reported profits