We are a retail store. One of the companies that we buy from also sells their product via home parties. They have recently announced that they will be forcing us to sell their product at 20% more than home party sales reps. Their reasoning is that the home party reps feel that stores have an unfair advantage because it is more convenient for people to shop at a retail location. The company currently does about 80% of its business via home parties and 20% via retail stores. Is is legal to require us to sell their products at a higher price for the reason of giving consumers an incentive to buy their products somewhere else?