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Enhancing Consumer Experience at Modern Coffee Shops through Analysis of Customer Acquisition Cost, Lifetime Value, and Implementation of Blockchain Technology: A Case Study in Medan City. J. Sci. Educ. [Internet]. 2025 Jan. 9 [cited 2026 Oct. 29];5(2):484-90. Available from: https://jse.rezkimedia.org/jse/article/view/406