A researcher performs an experiment to test a hypothesis that involves the nutrients niacin and retinol. She feeds one group of laboratory rats a daily diet of precisely 28.95 units of niacin and 24,475 units of retinol. She uses two types of commercial pellet foods. Food A contains 0.12 unit of niacin and 125 units of retinol per gram. Food B contains 0.25 unit of niacin and 50 units of retinol per gram. How many grams of each food does she feed this group of rats each day?

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