Albino, M. G. ., M. A. D. . Cruz, and R. F. . Amistad. “Development of E-Genius Shopping Cart Billing Estimator Using Arduino Microcontroller”. International Journal of Innovative Analyses and Emerging Technology, vol. 1, no. 6, Nov. 2021, pp. 110-7, https://openaccessjournals.eu/index.php/ijiaet/article/view/649.