3.11. Retail is one of the first areas in adopting distributed data processing. Instead of centralizing the POS (point-of-sale) systems, retailers deploy distributed databases, so all of their POS systems are local, but linked to a central system. Prices for all merchandise are determined and maintained at the central system. Each day, before trading starts, relevant prices are downloaded to the POS system at each store, replicating the data of the central system. Analyze the economic advantages of the adoption of distributed data processing in the retail area.