During a negotiation, Jose Gomez, the salesperson for a strategic supplier, states that his sales director will not approve discounts against initial purchases. However, Jose offers a 5% discount on the aftercare package, which will provide the same monetary saving. Sally Pampas requires both the product and the aftercare package and has an objective to achieve a 5% discount off the purchase price. To achieve a win-win (integrative) negotiation, Sally should...