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Food X contains 4 units of vitamin A per gram and 7 units of vitamin B per gram and cost 15 paise per gram. Food Y contains 6 units of vitamin A per gram and 11 units of vitamin B per gram and cost 22 paise per gram. The daily minimum requirement of vitamin A and vitamin B are 90 units and 130 units, respectively. Formulate the problem in the form of inequations.