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From a 1969 Farrell's Grand Opening promotional piece for Sunnyvale, California:
We Predict
...based on what happened in other Farrell's Ice Cream Parlour Restaurants that during the next 12 months this Sunnyvale Farrell's will dish out 30 thousand gallons of rich, old-fashioned ice cream; 8,000 No. 10 size tins of flavored topping; about 20 thousand pounds of choice ground beef; 10 thousand pounds of corned beef and 120 thousand wonderfully delicious hamburger buns.
Man, that's a lot of corned beef...