Complex pricing/game theory

Your business partner is strongly opposed to your proposal to charge your largest customers lower prices for your web-based services than what you charge your smaller customers. She is arguing it is unethical, unfair, and possibly illegal. Address the following: Make a case that both groups of customers will be satisfied with the deal and that this is a perfectly legal form of pricing in a business-to-customer relationship. What degree ​‌‍‍‍‌‍‍‌‍‌‌‍‍‍‌‍‌‌‌‍​is this type of price discrimination? How will the plan increase revenue? Why will both groups of customers be satisfied with the deal? Why is this a legal form of pricing?