A grocer sells milk chocolate at $2.70 per pound, dark chocolate at $4.30 per pound, and dark chocolate with almonds at $5.30 per pound. He wants to make a mixture of 50 pounds of mixed chocolates to sell at $4.48 per pound. The mixture is to contain as many pounds of dark chocolate with almonds as milk chocolate and dark chocolate combined. How many pounds of each type must he use in this mixture?