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-- Dairy Queen in Park Royal Mall in West Vancouver, BC, Canada, on July 22, 2009
"Debit card guests"? Is the place called "Dairy Queen" or "Debit card"? It's the former, so I suggest writing "Debit card users" instead.
Customers is merely the plural form of
customer and therefore there should be no apostrophe before the S.
Transaction should be in a plural form, but, again, be sure to add the S without placing an apostrophe. The capitalization of every word - except
is?! - is making my head spin. On a positive note, the sign correctly states $0.25 instead of o.25¢.