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1. A poultry raiser wants to mix two types of grain: A and B: Each grain of A cost P40.00 and contains 20 grams of fat, 10 grams of protein and 800 calories. Each unit of grain B cost P48.00 and contains 30 grams of fat, 30 grams of protein and 600 calories.

Suppose the poultry raiser wants each unit of the final product to yield at least 180 grams of fat, at least 120 grams of protein and at least 4800 calories. How many unit of each type of grain should the poultry raiser use to minimize his cost?