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Joins us in studio to talk about this. andrea, good to have you here. lets talk about the cost-saving measures, where you advise us to cut back on our gas. you say people can use their smartphones to save on gas and then also shopping online. so, explain to all of us, one, the smartphone. shopping online i kind of get, but the smartphone, teach me that. >> okay. there are various apps that were designed to help you save at the pump. gas bunny is one app that uses your location and provides you w...