A farmer has 1200 acres of land on which he grows corn, wheat, and soybeans. It costs $45 per acre to grow corn, $60 per acre to grow wheat, and $50 per acre to grow soybeans. Because of market demand, the farmer will grow twice as many acres of wheat as of com. He has allocated $63,750 for the cost of growing his crops. How many acres of each crop should he plant? Be sure to include units.