Chris buys coffee for $1 per cup and tea for 50 per cup; every day she drinks

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Chris buys coffee for $1 per cup and tea for 50¢ per cup; every day she drinks 2 cups of coffee and 1 cup of tea. David buys coffee for 50¢ per cup and tea for $1 per cup; every day he drinks 1 cup of coffee and 2 cups of tea. Can you determine whether Chris and David have identical tastes?

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