“Beyond the academic novelty of an AI taking drive-thru orders, the test has borne some interesting results. Carpenter said the restaurant has seen 6 percent average increase in spending in the drive-thru in the past year of testing. Holly, it turns out, is pretty good at upselling the right item. ”
http://www.franchisetimes.com/news/July-2019/Holly-the-Drive-Thru-AI-at-Work-in-Good-Times/