Answer: Demand based pricing
Step-by-step explanation:
Ray-Ban's plan of gathering information about the other brands sold in department stores, which includes their prices, would most likely be used in a demand based basis for pricing
Demand-based pricing, refers to the method of pricing whereby the fluctuations in the demand of consumers is considered.
Due to the flctuations, the prices are adjusted in a way that fits the changes in the values of the product.